新人教版小学数学四年级上册全册教案
小海龟-广厦建设职业技术学院
The first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company o
implement the pe must be safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the comprehensive treatment, safe
developmentpproach.
Safety goals: 1, no
personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the stesne with national standards, larger, major
pollution accidents to zero. 9, hidden rate up to
100%. The tenth article: carbon target levels of
safety production control company: (a) control
injuries and accidents, physical death, not a
major equipment failure; (B) workshop injuries and
disorders, personal injuries and accidents do not
occur; (C) the team attempted to control and
abnormal, absence of physical injuries and
disorders. The 11th article: carbon units of the
company in accordance with the provisions of the
safety goals of the entity, and the implementation
of Division and implement. Safety responsibility
system in
section III article 12th
administrative job is our safety responsibility,
work safety and safety of this enterprise
objective overall responsibility. 13th: the
Executive job as security responsibility for the
basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
第一单元 大数的认识
第一课时
课题 亿以内数的认识（例1） 课型
新授
教 知识与技能：1、使学生知道生活中有比万大的数2、使学生进一步认识计
学
数单位“万、十万、百万、千万和亿”，类推每相邻两个计数单位之间的关
目 系，知道数级、数位。
标
过程与方法：使学生经历揭示各计数单位间的关系的过程，掌握数位顺序
表，理解位值的概念
情感、态度和价值观：
体会大数在生活中的广泛应用，培养学生在实际生活中寻找数学信息的意识
和能力
重点
认识计数单位“万、十万、百万、千万和亿”，
难点
掌握每相邻两个计数单位之间的关系
教具 图片和计数器
教师导学
教学
学生活动 教学意图
of responsibility system
for production safety; (B) the organizations
implement the relevant safety instructions,
important documents, coordinate and solve the
problems in the sector in the follow-up; (C) to
understand the safety, supervision, inspection,
safety, regularly receive reports safety
supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutons eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protection measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
过程 一、 复习导入：
1、我们以前都认识过哪些数？
2、数数：
1）从689一个一个的数到712。
2）从420一十一十的数到540
3）从910一十一十的数到1000
4）从200一十一十的数到1000
3、在生活中你见到过哪些比较大的
数？
4、出示图片：
在日常生活和生产中，我们经常用到
比万大的数。
北京市人口：13819000人
请学生试着读一读
这节课我们就来研究更大的数，板书
课题：亿以内数的认识
二、探究新知
1、请学生拿出计数器，一千一千地
数，当数到10个一千时问：一千一
千地数，10个一千是
多少？
强调：千位上的10个珠子怎么办？
2、请学生10个10个地数，当数到
10个一万时问：是多少
利用计数器问：怎么表示10个一
万？
3、照这样继续数下去
10个十万是多少？
10个一百万是多少
10个一千万是多少
学生在计数器上数数。
学生自由谈
以组为单位按要求
数数
学生自由汇报，课
前收集的数
观察图片，试着读
数。
10个一千是一万
拨回去，在万位上
拨一个珠子。
10个一万是十万
在十万位上拨1个
珠子。
同桌互相数数
10个十万是一百万
10个一百万是一千
万
10个一千万是一亿
全班交流
师：一、十、百、千、万、十万、百
万、千万都是计数单位。
想一想：每相邻两个计数单位之间是每相邻两个计数单
什么关系？
位之间是十进关
4、把所学数位按数位顺序表排列起系。
来
亿级 万级 个级
数级 说出数位顺
亿 千 百 十 万
千 百 十个
序表
万 万 万
位 位 位 位 位
位 位 位位
数位
1 3 8 1 9 0 0 0
↑
复习所学的数
的知识，为学
习新知做准
备。
。
感受到大数在
生活中的应
用，产生认识
大数的需要，
激发学生探究
新知的欲望
使学生进一步
认识计数单位
“万、十万、
百万、千万和
亿”，掌握每
相邻两个计数
单位之间的关
系
知道数级、数
位。
掌握数位顺序
表，理解位值
的概念
理解位值的概
念
The first: to
implement e treatment, safe developmentch, protect
the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
表示8个十万
每个计数单位都要占一个位置，按照
我国计数的习惯，每4个数位是一
级。
说一说其他数位上的数各表示多少？
学生说出数位上的
三、巩固新知 数表示什么。
1、 做一做的1题数数
2、
做一做的2题说一说生活中哪些
地方用到万以上的数。
3、练习一的第1题
四、小结：
学生两人一组，按
通过这节课的学习，你有什么收要求数数，互相检
获和体会？ 查。
五、作业：做一个数位顺序表 学生举例说明
亿以内数的认识
通过数数，理
解并掌握计数
规律。
体会大
数在生
活中的广泛应
用，培养学生
在实际生活中
寻找数学信息
的意识
和能力
亿级 万级 个级
亿
千 百 十 万 千 百 十 个
板书
设计
万 万 万
位 位 位 位 位 位 位 位 位
1 3 8 1 9 0 0 0
↑
表示8个十万
第二课时
课题 亿以内数的读写法（例2、例课型
新授
3）
教
知识与技能：1、使学生掌握亿以内数的读写法，概括出读写的方法。2、培养
学 学生类推迁移的能力
目 过程与方法：根据以有的知识，通过合作、讨论探究，学会读写亿以内的数。
标
情感、态度和价值观：
培养学生的合作交流能力以及学习数学的兴趣和自信心。
重
亿以内数的读写方法
点
难
中间、末尾有0的数的读
点
教卡片和计数器
具
教师导学 学生活动 教学意图
教
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学一、 复习引入
过1、看卡片，读数，说组成
程
3564、407、1000、570、603、7216、
10000、3003、5400、4009、5800、
6040、5708、40009
读数的方法是什么？
3、 计数器上显示数，学生写出来。
五千零四 八千九百
六千三百四十
三、八千零六十八，九千零一
写数的方法是什么？
4、
这节课我们赖学习：亿以内数的读
写法（板书课题）
二、探究新知：
1、例2读出下面各数
千 百 十 万 千 百 十 个
万 万 万
位 位 位 位 位 位 位 位
2 4 9 6
2 4 9 6 0 0
0 0
6 4 0 7 0 0 0
8 5 0
0 0 3 0 0
读作：_______
学生自己试读，讨论怎么读？
问：1）含两极的数怎么读？
2）万级数的读法与个级数的读法有什
么联系和区别。
3）数位上出现0有该怎么读？
读数说组成
总结读数方法
在练习本上写数
说出写数的方法
2496读作：二千四
百九十六
24960000 读作：二
千四百九十六万
6407000读作：六百
四十万七千
85000030
读作：八
千五百万零三十
亿以内数的读法与
万以内数的读法相
同，只是多加一个
级称
万级的数按照个级
的数的读法来读，
再在后面加上一个
“万”字
复习千以内数
的读写法知
识，为学习新
知做准备。
。
使学生掌握亿
以内数的读
法，概括出读
数的方法，能
正确的读数
The first: to implement
e treatment, safe developmentch, protect the
safety of employees in the enterprise production,
carbon company equipment to ensure safe and
reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
师归纳：个级的数表示的是多少亿以内数每级末尾
“个”，万级的数表示多少“万”
的零不读，数中间
4）问：怎么读亿以内的数？ 的零只读一个
师总结归纳：先度完级，再读个级，万
级的数要按照个级的数的读法来读，再学生述说读数方法
在后面加上一个“万”字，每级末尾不
管有几个0，都不读，其他数位有一个
0或连续有几个0，都只读一个0
5）完成做一做
2、例3
独立完成，全班订
2000年有六千八百五十万少先队员参
正
加了“手拉手”活动，三千零八十万人
参加了“保护母亲河”行动。
千 百 十 万 千 百 十 个
读题找出数据
万 万 万
位 位 位 位 位 位 位 位
六千八百五十万：
三千零八十万：
一千五百六十九万三千
六百七十二万三千一百一十三
学生尝试写数
四万零九十
写作：68500000
学生试着写数
讨论：含有两级的数怎么写？先写哪一
写作：30800000
级，什么时候写0？
写作：15693000
完成做一做写数
写作：6723113
问：怎么写亿以内的数？
师归纳：先写万级，再写个级，哪一位
写作：40090
上一个单位也没有，写0占位。
三、巩固新知
1、练习一的2、3读出数
2、练习一的第7题写数
四、小结：
通过这节课的学习，你有什么收获
学生讨论写数的方
和体会？
法
五、作业：练习一5、6、9
独立完成，同桌互
相查。
使学生掌握亿
以内数的读
法，概括出写
数的方法，能
正确地写数。
通过练习，进
一步加深对亿
以内读写法的
理解，提高读
写数的能力。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
课
后
反
思
第三课时
课题 亿以内数的读写法练习 课型 练习
教
知识与技能：1、通过练习，巩固亿以内数的读写数的方法，使学生能正确
学
地读写数。2、培养学生对大数的数感和分析判断的能力。
目
过程与方法：使学生经历巩固亿以内读数和写数方法的过程，提高学生正确
标 读写数的能力
情感、态度和价值观：
培养学生的合作交流能力以及学习数学的兴趣和自信心。
重点
能正确地读写亿以内的数
难点
能正确地读写亿以内的数
教具 题卡
教学
教师导学 学生活动 教学意图
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
过程 一、创设情景： （×）
1、你们都想当小老师吧！今天我读作：四千八百七十二
们就比一比谁是“优秀小教（√）
师”。 读作：三千一百六十八万
每人发一张学生课前做的练习（√） 。
卡。 读作：八千六百万零零九
2、内容：判断题： 十 （×） 使学生理解
（1）万级的计数单位是万位、十读作：五百三
十万零一千计数单位、
万位、百万位、千万位。 （×）。 数级等数学
2）读出下面数
读作：一千二百万六百零概念，掌握
4872 5301000 31680000
五 亿以内数的
86000090 12000605
（×）。 读写法。
（3）写出下面各数 写作：42700000（√）
四千二百七十万 一百万七千
写作： 1007000 （√）
七万零九十 一千零五十万零三写作：7090
（×）
十 写作：1050030
二、判断反思： ①数位、计数单位、数级
（1）请小老师判断第一题。 ②把计数单位按一定的顺通过争当小
反思：
序排列起来，它们所在的老师
①第一题涉及哪些数学概念？
位置，叫做数位；所学的一事，培养
② 谈谈你对数位的认识。
数位有个位、十位、百学生反思的
③谈谈你对计数单位的认识。 位、千位、万位、十万意识。
④ 谈谈你对数级的认识。 位、百万位、千万位③所培养学生做
（四位一分级，分为个级、万
学的计数单位有：个、事认真负责
级、亿级） 十、百、千、万、十万、的态度。
⑤你对这三个数学概念还有什么百万、千万；计数单位与
疑问吗？
数位的字面的区别是没有
⑥提问：每相邻两个计数单位之“位”字
间有什么关系？
亿以内数的读法与万以内
（2）请小老师判断第二题。
数的读法相同，只是多加
①观察第一、二小题你有什么想一个级称
法吗
②观察第三、四小题你觉得应该
提醒同学们注意什么？？
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
③谁能对亿以内数的读法进行总
结？
（3）请小老师判断第三题。
①想一想怎样写出亿以内数？
②有什么需要提醒同学注意的地
方吗？
（4）就亿以内数的读写法你有什
么
建设性的意见？也就是怎样能
迅速、快捷、避免错误。
（5）请你对自己评价一下，是否
是一个好老师。
三、巩固练习：
要想当
一个好老师光给别人挑出
问题是不够的，自己必须概念清
晰。下面请你们自己测试一下自
己。
1、出示书中的图片练习P9 4
题，P10 8题，P11 11题。
2、通过这组练习请你为自己打
分。来读
判断下面那些说法不合理。
珠穆朗玛峰高8848米；
我今天卖出二千万根冰棍；
我们学校有500多人；
我们学校有十万人。
3、用0、0、0、1、2、3、4这七
个数字按要求组成七位数。
读两个0；读一个0；所有的0都
不读；读三个0。
4．第12页
第12题；第14题；
5、合作小组用自己做的转盘练习
读、写数。
四总结：请你谈谈当一名好老师
的感受。
五、作业：第12页的13题
转盘练习读、写数。
课后
反思
亿以内数每级末尾的零不
读，数中间的零只读一个
零占位的问题
读、写法注意四位一分
级；做完回查
学生自己评价
正确读出和写出图下面的
数
判断说出原因
小组讨论后交流汇报。
独立完成后全班汇报。
巩固亿以内
读数和写数
方法，提高
学生正确读
写数的能力
培养学生对
大数的数
感，训练学
生分析判断
的能力
以游戏形式
呈现，调动
学生学习的
积极性。
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
第四课时
课题 亿以内数的大小比较 课型 新授
教
知识与技能：1、使学生掌握亿以内数的大小比较方法，能正确比较数的大
学
小。2、培养学生知识迁移和归纳概括的能力。
目
过程与方法：使学生经历比较两个数方法的形成过程，体验迁移类推的方法
标
情感、态度和价值观：
通过比较两个数大小的学习，使学生感悟到数之间的内在联系，激发学生学
好数学的信心。
重点
掌握亿以内数的大小比较方法
难点
能正确地比较数的大小
教具 题卡
教学
教师导学 学生活动 教学意图
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
过程
一、 情境导入：
1、同学们收集了有关大数的信
息，请你把收集到的数和同学说
一说？
2、引入新课
你们知道这些数中哪个大？哪个
小吗？这节课我们就来一起探讨
比较这些数大小的方法。
板书课题：亿以内数的大小比较
二、探究新知
例4出示我国最大的6个省份面
积的情境图。
黑龙江：4548000
青海：720000
内蒙古：1100000四川：485000
西藏：1210000
新疆；1660000
师：你会比较每两个省面积的大
小吗？试一试
汇报：说说自己是怎样比较的？
问；比较两个数大小的方法是什
么？师归纳概括
位数不同，位数多的数就大，
位数相同，左起第一位的数大的
哪个数就大；如果左起
第一位上
的数相同，，就比较左起第二位上
的数„„
练习：比较数的大小
92504〇103600 50140〇63140
28906〇28890
620300〇
307300
学生展示收集的数据
观察图片，读出数据
学生尝试在本上比大
小，小组交流。
1210000 〉 72000
454800 〈 48500
1100000 〈 1660000
1660000 〉 11720000
小组代表在全班汇报交
流自己组的比较方法
独立完成，集体订正，
说出比较大小的方法
收集生活中的
数进行展示，
提高学生收集
和整理数据的
能力。
。
通过迁移类
推
，使学生掌
握亿以内数的
大小比较方
法，能正确比
较数的大小
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
三、巩固新知
书后练习二
1、
比较下面每组中两个数的大
小。
98965〇100000 208808〇99999
70060〇70201
30500000〇3050000
2、按照从小到大的顺序排列下面
各数。
50500
500500 55000 40005
3、写出几个大于99987的五位
数？
4、你知道比最大的五位数大，而
且比最小的七位数小的数共有多
少个吗？
独立完成，说出比大小
的方法
独立完成，全班汇报
讨论后，交流自己的想
法
通过练习，巩
固比大小的方
法，提高学生
的能力。
四、总结：
这节课学习了什么？还有什么问
题吗？
五、作业：
自主练习比大小的题
亿以内数的大小比较
黑龙江：4548000
青海：720000内蒙古：1100000四川：485000 西藏：
1210000
新疆；1660000
板书
设计
1210000 〉 72000
454800 〈 48500 位数不同 位数
多的数大
1100000 〈 1660000 1660000 〉 11720000
位数相同 看最
高位 如果„„
如果„„
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
课后
小记
第五课时
课题 改写和省略 课型 新授
教
知识与技能：1、 使学生掌握把整万的数改写成以万为单位的数。四舍五入
学
省略“万”后面的尾数求近似数的方法。理解改写与省略的相同与不同。
目 2、
培养学生归纳和概括的能力。
标 过程与方法：
使学生经历掌握省略和改写方法的过程，理解改写与省略的
相同与不同
情感、态度和价值观：
使学生体会大数在生活中的应用，激发他们的学习乐趣。
重点
使学生掌握改写、省略的方法。
难点
使学生掌握改写、省略的方法。
教具 题卡
教学教师导学 学生活动 教学意图
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
过程
一、 复习旧知
1、写出下面各题：
二万 六十万
四百五十万
八百零七万 三千六百四时万
2、在日常生活生产中，为了读数
方
便，经常将数进行改写。这节课
我们就来学习改写，板书课题：改
写
二、探究新知
1、教学例5改写下面各数：（以万
为单位）
出示人体血液的构造图；介绍红、
白细胞的作用。
一滴血液中含有：5000000个红细
胞；含有10000个白细胞。
1）读出数看看这两个数有什么特
点？
2）有时为了读写方便，可以将万
位
后面的4个0省略掉，换成一个
“万“字，就把整万的数改写成了
以万作单位的数。
红细胞：5000000个=500万个
白细胞：10000个=1万个
学生写数汇报
观察图，了解红白细
胞的
作用
每人读数
这两个数都是整万的
数
小组讨论
复习旧知识，
为学习新知识
作准备
使学生掌握把
整万的数改写
成以万为单位
的数的方法
尝试把整万的数改写
成了以万作单位的
巩固改写的方
法
数。
3）下面的数改写成以“万”作单
位的数。
独立完成后交流改写
250000 3200000
7580000
的方法
4）我国最大的沙漠是新疆的塔克
拉玛干沙漠，面积约320000平方
千米。
5）我国的青藏高原是世界上最大
的
高原，面积约2400000平方千米。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
2、例6、用四舍五入法求近似值
1）展示太阳和地球图
2）读出太阳地球的直径分别是多
少
3）说一说怎样能很快看出太阳的
直径是地球的多少倍。
4）启发学生：用以万做单位的数
进行比较会比较方便
省略万后面的尾数，求下面各数的
近似数。
师：怎样用四舍五入法求近似值？
地球的直径约为12756千米
太阳的直径约为1389000千米
12756≈10000
↑ =1万
小于5，把它和右面的数全舍去，
改写成0。
1389000≈1390000
↑ =139万
大于5，向前一位进1，再把它和
右面的数全舍去，改写成0。
5）这种求近似数的
方法叫四舍五
入法。是舍还是入，要看省略的尾
数部分的最高位是小于5还是等于
5或
大于5
6）问：你能说说改写和省略的异
同之处吗？（补充课题：省略）
7）书后做一做完成
三、巩固新知
练习二第3题改写以万作单位的数
2、练习二第4题：下面画线部分
哪些是近似数，哪些是准确数？
3练习二第5题：求下面各数的近
似数第五次人口普查：
四、小结：
这节课学习了什么，有什么问题？
五、作业；练习二第6、7、8题
观察收集图中的信
息，描述太阳和地球
的大小关系。
讨论后交流汇报
叙述求近似数的方
法。
说说四舍五入法。
小组讨论汇报
改写和省略的相同点
和不同点。
完成后说省略的方法
学生独立完成交流汇
报
填写表格，交流汇报
使学生掌握用
四舍五入省略
“万”后面的
尾数求近似数
的方法。
通过练习，巩
固改写和省略
的方法。进一
步理解近似数
的
含义和在实
际生活中的作
用。
The first: to
implement e treatment, safe developmentch, protect
the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
改写和省略
例5
红细胞：5000000个=500万个 白细胞：10000个=1万个
例6
12756≈10000 1389000≈1390000
=1万 =139万
第六课时
课题
教
学
目
标
数的产生、十进制计数法
课型 新授
知识与技能：1、使学生了解数的产生，掌握十进制计数法，初步认识亿以
上的数。2、培养学
生抽象、概括和类推迁移的能力。
过程与方法：使学生经历认识数的产生、十进制计数法的全过程，掌握十进
制计数法
情感、态度和价值观：
使学生感受到数的产生来源于生活，并为生活服务。
重点
使学生了解数的产生，掌握十进制计数法，初步认识亿以上的数。
难点
掌握十进制计数法
教具
教学
学生课前查找资料、图片、数位顺序表
教师导学 学生活动 教学意图
of responsibility system
for production safety; (B) the organizations
implement the relevant safety instructions,
important documents, coordinate and solve the
problems in the sector in the follow-up; (C) to
understand the safety, supervision, inspection,
safety, regularly receive reports safety
supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
过程
一、导入新课
我们已经学习了近3年的数学，
每天都要和数打交道，这些数究
竟是怎么产生的呢？
板书课题：数的产生
二、探究新知
1、数的产生
师：课前大家查找了一些资料，
哪组愿意为大家介绍一下数是怎
么产生的？生：介绍
师：补充
2、记数符号
师：看来数的产生来源于生产、
生活的需要，下面介绍一些记数
符号。
出示： 巴比伦数字：（略）中国
数字：（略） 罗马数字：（略）
问：你们知道阿拉伯数字是怎么
产生的吗？
2、 然数的认识
师：表示物
体个数的1、2、3、
4、5、6、7、8、9、10、11„„
都是自然数，一个物体也没有
，
用0表示，0也是自然数。
最小的自然数是0，没有最大的
自然数，自然数的个数是无限
的。
二、十进制计数法
师：生活中还有更大的数，需要
用数级更多的数位表读写。
例如：
学生思考
学汇报
人们在生产劳动中需要
人数、物体个数和捕获
的野兽数目等等，就产
生了数。
学生看图，古代人的计
数方法
看图片，三种古代数
字。
介绍自然数的含义和特
点
学生说一说自己的理
解，在全班交流。
设问引起学生
的注意力和学
习的兴趣。
列举实例，使
学生对数的产
生有一个初步
的认识
使学生知道自
然数概念的含
义和特点、性
质
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
（！）我国人口：1295330000人
全球人口：6100000000人
（2）2000年第5次人口普查结
果，我国人口总数是十二亿九千
五百三十三万人。
（3）1999年联合国公布世界人
口已达到六十亿，世界上每5个
人中，就有一个中
国人。
（4）1978年至1998年的20年
中，我国城镇新建住宅四十七亿
五千
万平方米。
（5）北京的密云水库可以容纳四
十三亿七千五百万吨水。
看来，用我
们以前学过的知识，
不能知道这些数字是多少了，所
以要学习比亿还大的数。
下面我们就来学习亿级的数位和计数
单位，拿出数位顺序表。（出表）
1、小组合作研究：
（1）观察数位顺序表，个级与万级
有什么相同点？不同点？根
据它们的
特点，顺序填上亿级的数位和计数单
位。（2）每相邻的两个计数单位之间
的
进率是多少？2、学生反馈
3、小结：每相邻的两个计数单位之
间的进率都是十，这种计数方
法叫十
进制计数法。4、做一做：1）一个五
位数，它的最高位是什么位？一个九
位数
，一个十二位数呢？2）说出下
面每个数中“3”所在的数位和表示
的意义。
353087030431
三、巩固练习：
1、按从右往左的顺序，说出千亿以
内的数位
学生试着读一读
借助数位顺序表试一
试。
汇报交流
学生记数位顺序表，互
相提问练习。
相同点：每级都有四
位，四位的顺序是个、
十、百、千。
不同点：每级表示的数
目大小不同，即计数单
位不同。
探索新的计数单位
独立完成，掌握数位顺
序表。
说数位顺序
使学会僧掌握
十进制计数
法，初步认识
亿以上的数。<
br>培养学生抽
象、概括和类
推迁移的能
力。
通过练习，巩
固所学的知
识，提高学生
的能力
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
2、回答下面各题：
（1）个级、万级、亿级各有哪些数
位？
（2）从个位起，第几位是万位？第
几位是亿位？
（3）和亿位相邻的两个数位是什么
位？
四、总结：
这节课学习了什么？还有什么问题
吗？
五、作业：掌握“整数数位顺序表”
同桌互相回答，再全班
交流。
第七课时
课题 课型 新授
亿以上数的读、写法
教
知识与技能：1
使学生能够正确读、写亿以上的数。2 在学习的过程中，引
学
导学生利用已有的旧知识学习新知识。使学生认识到数学知识之间是有联系
目
的。
标
过程与方法：使学生经历读、写亿以上的数的过程，体验迁移类推的方法
情感、态度和价值观：
引导学生关注学习的过程，使学生体验到学习的乐趣。
重点
学习亿以上数的读法、写法。
难点
中间和末尾有0的数的读写。
教具
题卡
教学
教师导学 学生活动 教学意图
The first:
to implement e treatment, safe developmentch,
protect the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
过程
一 复习引入：
1.小组交流：
在课前让学生搜集一些生活中的
大数，可以有
意识的用学生复习亿以内数时用到过的一些数
据。上课时，请同学们把搜集的数据
在小组内
互相读读、写写。再说说是怎样读或写这些数
的。
2. 全班交流：
（1）以小组为单位交流。 引导学生看亿以内
的数是怎么读的，怎么写的。
（2）全班交流亿以内数读写方法。
二、探究新知
（一）．亿以上数的读法
1、出示一些亿以上数的信息。例如：
①地球到太阳的平均距离是149600000千米。
②我国平均每月生产和丢弃的一次性筷子大约
是3700500000双。
③2002年我国出口总额约为325600000000美
元。
④截止到2003年一月，我国青少年上网人数
约为102000300人。
师：请你比较一下这些数和刚才读的数有什么
不同的地方吗？
2、以小组为单位合作研究：要求：
(1)
先自己试着读读这样含有三级的数，再在
小组内互相读读。
(2)
和小组内的同学交流一下，你是怎样
帮助学生复习，
亿以内数的读写
法，为学习新知
识作准备。
。
培养学生搜集信
息的能力。
使学生观察到数
级
扩展成是三级数
读这些数的？试着说说读数方法是什么？
3. 全班反馈：
在学生读的基础上，让学生说说读亿以上的数
的方法是什么？
4.
说读法时，重点处理0的读法：
如果刚才学生说到的数中有0的可以指着让学
生读读(不管学
生说到0的问题没有，都要着
重处理0的读法。在读数时，0最难读，数中
间连续有几个0都只
读一个。每级末尾的0都
不读。
交流说读数的
方法。
学生以小组为
单位到前边来
读数。
①从高位读
使学生掌握亿以
上数的读数方
法，能正确地读
数。
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
（教师可以有针对性地出示几个练习强化0的
读法）例如：
(1)
听录音判断对错：
610 0000 0000 236 0509 0008
100 4000 2000 问：“你怎么这么快就得出
答案来了？”（分级了）
(2) 教师出示读数的卡片让学生读：
800 7000 65 0006
1500 8000
3040 0000 70 0000 5000
5080 0060 0000
（教师在这要重点抽问：哪个0读了？
哪个
0没读？为什么？）
5、
师：你觉得读含有2级的数和含有3级的
数在读法上有什么相同的地方，有什么不同的
地方？
6、下面围绕读法进行练习。 做练习一：并填
反思表。
（1）读出下列各数：
8300000000 578000000 20700600
1
62
4600800000
读完六个数可以填写反思表，一共3个题。
反思表
1. 六个数，你读对了（ ）个数？
2.
你是怎么读出比亿大的数的？（多选）
（ ）
①数中间有一个0或连续有几个0，都只读一
个零；每级末尾的零都不读。
②从高位读起，一级一级往下读。
③读亿级或万级的数，先按照个级的读法读，
再在后面加上一个“亿”字或“万”字。
3. 亿以上数的读法你是怎么学会的？
（ ）
①自己看书 ②
通过别人帮助学会的。别人
是（ ）
③利用以前学过的读数方法来读亿以上的数
的。
起，一级一级
往下读。②读
亿级或万级的
数，先按照个
级的读法读，
再在后面加上
一个“亿”字
或“万”字。
③数中间有一
个0或连续有
几个0，都只
读一个零；每
级末尾的零都
不读。
读法一样，数
级扩展
读作：六百一
十亿 （√）
读作：二百三
十六亿零五百
零九万零零零
八。（╳）
读作：一千零
四亿零二千。
（╳）
指名读数
读法一样，数
级扩展
有意识的引导孩
子感受到新旧知
识之间的联系，
为下面
学习亿以
上数的写法做好
知识和方法的准
备
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
④ 其他
5.
师：你觉得读含有2级的数和含有3级的
数在读法上有什么相同的地方，有什么不同的
地方？
（二） 亿以上数的写法。
1.师：我们已经学习了怎样写含有2级的数。
请同学们打开练习2
，你能试着写出下面这
些数吗？
写出下面各数。（先自己写，再小组间互相说
说）
二百零六亿零五百八十万 写作：
四百八十亿
写作：
十二亿七千六百万 写作：
三十亿零六十万
写作：
一千零四十亿零五百万 写作：
同时提供给学生思考题思考：(先自己思
考，再小组间说说)
（1）.
请你思考一下有什么好方法、好经验
要和同学们交流的？
2. 学生反馈：
（1）首先全班交流数写的对不对，订正。
（2）重点处理写数的方法：以学生交流的形
式进行方法总结。
3.
在这里教师要重点处理0的写法。
（1）哪个数位上一个单位也没有，就在那个
数位上用0占位。
（2）使学生意识到，不能读几个0就写几个
0。
４．组间交流。学生手中有很多数
据，可以充
分利用，可以安排这样一个活动，两人间读一
条自己喜欢的大数的数据，1人读，1
人记
录。
先自
己读读，
再2人互相读
读。1人读1
人判断。再换
过来读。有争
议的
可以举手
学生填表
四、总结：
这节课学习了什么？还有什么问题吗？
五、作业：
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学生选择后填空，全班
零都不读。
汇报
②
②从高位读起，一级一级往下
读。
③读亿级或万级的数，先按照个级的
读法读，再在后面加上一个“亿”字
或“万”字。3.亿以上数的读法你是
怎么学会的？（ ）
使学生掌握亿以
①自己看书 ②
通过别人帮助学会
上数的写数方
的。别人是（ ）
法，能正确地写
③利用以前学过的读数方法来读亿以
数
。
上的数的④ 其他
（二）
亿以上数的写法。
.师：我们已经学习了怎样写含有2
先自己写，再小组间互
级的数。请同学们打开练习2 ，你
相说说
能试着写出下面这些数吗？练习二
１．写出下面各数。
教学
二百零六亿零五百八十万 写
过程
作：
四百八十亿
写
作：
学生思考方法，小组
十二亿七千六百万 写
交流
作：
三十亿零六十万
写
作：
一千零四十亿零五百万
写
作：
同时提供给学生思考题思考：.
交流数写的对不对，全
请你思考一下有什么好方法、好经验班订正。
①
数中间有一个0或连续有几个
要和同学们交流的？
2. 学生反馈：（1）首先全班交流数<
br>写的对不对，订正。（2）重点处理写
数的方法：以学生交流的形式进行方
法总结。
3. 在这里教师要重点处理0的写
法。
学生交流，进行方法总
结。
学生讨论有关0的问题
反思学习过程，
引导学生关注学
习过程和方法，
使学生感受到学
习的乐趣。
0，都只读一个零；每级末尾的
The first:
to implement e treatment, safe developmentch,
protect the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
（1）哪个数位上一个单位也没有，
就在那个数位上用0占位。
（2）使
学生意识到，不能读几个0就写几个
0。
两个人互相读数
４．组间交流。学生手中有很多数
据，可以充分利用，可以安排这样一
个活动，两人间读一条自己喜欢的大
数的数据，1人读，1
人记录。小结：
（1）怎么写亿以上数的。（2）自己
是怎么解决新问题的。
三.
巩固练习：
1、读数（1）我国人口总数是1295330000人。
吨。（3）1995年我国城乡新建住宅4300000000
（2）1997年我国粮食总产量达到494170000
平方米。
2、先说出下面各数是几位数，最高位是什么
位？再读出来。
20700600
4600800000 1
独立完成，全班
汇报
通过练习，巩
固读写数的方
法，能正确地
读数和写数
。
80049020 5000000000
讨论后，交流自
3007050000
3、把下面的数读出来。
土星是太阳系中的第二大行星，与太阳的平均
己的想法
教学
距离是1427000000千米，绕太阳一周要用29
过程
年半。我们用最大的天文望远镜至少可看到
指名回答，订正
1000000000颗星。
我国自行车社会拥有量为470000000，有“自
行车王国”之称。
4、写出下面各数，再指出各是几位数。
一百万 三亿零七十万 十亿
二十亿零五百零二万
五亿七千八百万
四千零八十亿四千零八万 六十万三千
独立完成，全班
一百二十五亿零九万
5、把下面的数写出来。（1）金星和太阳的平
均距离是一亿零八百二十一万千米。（2）地球
汇报。
和太阳的平均距离是一亿四千九百五十万千米。
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
（3）四川省合州县发现的恐龙化石距今已有一
亿三千万年。（4）地球上绿色植物每年吸收二
氧化碳近九百三十六亿吨。（5）1998年我
国在
校小学生约有一亿三千九百五十万人。
四．总结：谈谈收获、体会、遗憾 。
五作业；练习三的3——8。
读题写数，互相
交流
第八课时
课题 亿以上数的改写和省略 课型 新授
教
知识与技能：1、通过学习，使学生掌握把整亿的数改写成以亿作单位的
学
数，并能较熟练的进行改写。
目
2使学生能正确用四舍五入方法省略亿位后面的尾数。
标
过程与方法：使学生经历掌握省略和改写方法的过程，理解改写与省略的相
同与不同
情感、态度和价值观：
1、培养学生良好的学习习惯，提高其应用数学的意识。2让学生感到数学与<
br>生活的紧密联系，激发他们的学习乐趣。
重点
掌握改写的方法，掌握求近似数的方法。（四舍五入法）
难点
四舍五入与改写的区别
教具 题卡
教学
教师导学 学生活动 教学意图
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
过程 一、复习导入：
150000=（ ）万
70450≈（
）万 口答结果
204000=（ ）万 去掉万位后面的 4
296780≈（ ）万
个0，再加上单位
什么叫改写？怎样改写？
“万”字，
什么叫四舍五入到万位？怎样四舍五入“0000”代表
到万位？ “万”
这节课我们来学：亿以上数的改写和省
略（板书课题）
二、探究新知
（一）数的改写
1、自主学习：
学生读数
出示：人类用最大的望远镜可以观测到
天空中1000000000颗行星。
（！）谁愿意先读读这个数？
改写
（2）你有好办法一下就读出这个数
小组讨论交流改写
吗？
这个数怎样改写成以亿作单位的
的方法
数？
小结并板书：1000000000=（10）亿
汇报方法和注意的
注意：只去掉亿位后面的8个
地方
“0”，不要有几个“0”去几个
“0”。
改写后，不要丢掉原题的单位名称。
独立练习，订正结
果
2、练习：
69000000000=（ ）亿
4200000000=42（ ）亿
8000000000元=（ ）亿元
3、小结：怎样把一个数改写成以亿作单位
的数？什么样的数可以改写成以亿作单位
的数？
去掉万级、个级的8
个0，换一个亿字。
复写旧知识，
为学习新课做
准备。
使学生掌握把
整亿的数改写
成
以亿作单位
的数的方法，
并能较熟练的
进行改写。
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
（二）求近似数
1、
出示：省略亿后面的尾数，求下面各
数的近似数。
235000000
284000000
小组讨论：用什么方法求？怎样求？学生
汇报并板书：出示线段图
想：这两个数在2亿和3亿之间，哪个数
更接近2亿呢？哪个数更接近3亿呢？
就要看千万位上的数，把它四舍五入，
所以：235000000 ≈ 2亿
284000000 ≈ 3亿
讨论后，交流自己
的想法
观察线段图，确定
方法。
2、练习：把下面的数四舍五入到亿位。
独立完成，指名汇
1276270000≈_____亿
报
2≈_____亿
3、小结：怎样省略亿位后面的尾数，求近
似数？根据省略尾数的最高位千万位上的
总结省略的方法
数来决定四舍还是五入，并且五入时不要
忘记进1，而且有时还会遇到连续进位的
情况。如：29970000000≈_____亿
试着求一求。板书：29970000000≈300亿
省略尾数是按一定的要求去掉尾数，求出
的是原数的近似数，改变了原数的大小，
所以要用≈表示。
三、巩固练习：
1、把下面各数改写成以亿作单位的数。
独立完成后，同位
互查。
500000000
48000000000
7200000000 1
交流方法
2、在（ ）里填上适当的数。
65400 ≈ （ ）万
452081750 ≈
（ ）亿 270400 ≈（ ）万
独立完成后，同位
1873000000吨≈ （ ）亿吨
互查。
3、省略下面各数亿位后面的尾数，写出近
似数。
交流方法
437000000 2695000000千克
589000000 2049000000米
使学生能正确
用四舍五入方
法省略亿位后
面的尾数
理解改写和省
略的区别
通过练习，巩
固省略和改写
的方法，能正
确的解答
提高学生分析
和判断的能
力。
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
4、判断下面各题。
（1）795000 ≈
79
判断并说明错因，
改正过来
万
（ ）
（2）5304900 ≈ 530
（ ）
（3）1700000=17万
万
（ ）
（4）449600000 ≈ 5亿
（
）
（5）1000000000=10亿
（ ）
（6）952000000 ≈ 10
（ ）
四、小结；今天我们一起研究了改写和省
略，对于今天的学习，你有什么想法？
五、作业：
亿
练习三的10、16、17、18
第九课时
课题
计算工具的认识与使用
教
学
目
标
课型 新授
知识与技能：1、使学生简单了解计算工具的发展（结绳记事、算筹
等）2、
向学生介绍我国的传统计算工具——算盘，及其计算方法。3、使学生知道
计算器上的
各个功能键的作用，会使用计算器进行计算。
过程与方法：使学生经历认识和使用计算工具的过程，会使用计算器进行计
算。
情感、态度和价值观：
1、培养学生学习数学的兴趣。2、使学生感受生活中处处有数学。
重点
认识算盘、计算器，计算器的使用
难点 利用计算器来进行计算
教具 算盘、计算器、图片
教师导学
教学
学生活动 教学意图
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
过程
一、 导入：
1、师：今天我们来一起认识一些计
算工具。你知道哪些计算工具？
2、学生介绍计算工具
3、介绍古代计算工具：
计算工具从古到今，随着人类社会的
不断进步，经过了漫长的发展过程。
远古时代，
人类在捕鱼、狩猎和采集
果实的劳动中，产生了计数的需要。
人们就用手指、石子、结绳或在木
棒
上刻痕来计数。这种方法只能计数，
而不能清楚的表示出计数级的是什么
事情，人们
开始想一些新的办法来计
数。这就出现了这样一种计数方法—
—算筹。
介绍算筹：
我国古代人用算筹计算。用算筹表示
一个数，采用十进位制，并且纵式横
式交替使用。
个位数用纵式表示，十
位数用横是表示，百位数再用纵式表
示“„„”空格表示零。
二、新授：
（一）认识算盘：
学生介绍计算工具
使学生了解计算工
具的发展和我国的
传统计算工具——
算盘的由来
和特
点。
。
算筹一般是用十几厘
米长的竹签制成（也
可是骨制或木制的）。
用这些算筹摆成不同
的形式，表示不同得
数目，并进行各种计
算。用算筹表示数有
纵、横两种形式。
1、介绍算盘的由来：后来我国劳动
人民创造了算盘作为计算工具。早在
公
元15世纪，算盘已经在我国广泛
使用，后来游船到日本、朝鲜等国。
它的特点是结构简单，使
用方便，特
别实用他计算数目较大和数目较多的
加减法，更为简便。
2、介绍算盘的组成：算盘各部分的
名称如下图：（略）
学生介绍算盘由来和
特点
The first: to
implement e treatment, safe developmentch, protect
the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
刚才同学们介绍了许多的计算工具，
其中（1）算盘是我们中国所特有
的，
现在在许多地方还能见到。你认
识算盘吗？对算盘有哪些了解？
拨出一个数，说一说这表示多少？
（2）两种不同的算盘：出示两种不
同的算盘（书
23页图）：观察有什么
不同。左边的算盘是中国算盘，上面
有两颗珠子，每颗代表5。后来算
盘
发展到日本，逐渐演变成右边这样，
上面变成了一颗珠子。
原因是：原来是中国采
用的是16进
制，满15进1，所以算盘每档上是
15；进入日本后，采用的是十进制，
所以算盘的上面剩下1颗珠子。（3）
算盘的两种功能：计算和计数3、介
绍计数方法：（教
师边操作边讲解）
算盘上的每一档代表一个数位。我们
选定一档作个位（做个记号），从这<
br>一档起向左数，就是十位、百位、千
位、万位，这与整数的数位顺序完全
相同。
（1）算盘各部分名称
算盘的长方形的框内
装有一根
横梁，梁上
钻孔镶上小棍数根，
称为档。每根上穿一
串珠子，叫算盘子儿
或算
珠。常见的算盘
是两颗算珠在横梁
上，每颗代表五；五
颗在横梁下，每颗代
表
一。计算时按规定
的方法拨动算盘子儿
而得出计算结果。在
拨数时要先定好数
位，规定哪档是个
位，然后再拨数。
（规定从右往左数第
三档为个位）
使学生了解算盘的
结构和记数的方
法，
算珠都靠框时，表示算盘上没有数。
计数时要拨主靠梁。一个下珠表示
1，一个上珠表示5。请你在算盘上
表示出1—9（学生动手）
同样，在十位、百位、千位、万位拨
珠靠梁，就分别表示
几十、几百、几
千、几万，“0”用空档表示。拨珠
时，要按照数位从高位拨起。例如
（边说变操作）10、325、4709、4、
练习：
老师说数，请你拨，比比谁拨的快
2468 6890 5632 76890
3456
7894 20948 23098
（二）计算器的认识
1、 导入： 刚才介绍的我国古代的一些计算方法
和工具的使用。由于科学技术的发
展，现在的人们已经
不再使用这些工
具了。我们经常使用计算器来进行计
算，只要输入题目，计算器就会显示
结果，运算过程自动完成。这样非常
简便快捷。
学生动手在算盘上拨
珠
学生进行拨珠比赛
两人一组，相互出题
拨数
介绍计算器
使学生知道计
算器
上的各个功能键的
作用，会使用计算
器进行计算
。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
2、 介绍功能键：
计算器的种类很多，我们先来看看这一
简单的计算器。自主学习
Onc：谁知道这个键有什么作用？
Off：谁知道这个键有什么作用？。
3、
计算操作：
师：都有谁会使用计算器？学生：介绍
使用方法：按onc键，显示：0
输入
题目
按=键，显示结果 再按onc键，清屏。
4、利用计算器计算
（1）386+179 825-138
先估算这道题大约得几？怎样估算？
利用计算器怎样计算？
练一练：4468+1792 32010-8925
（2）用计算器计算乘、除法
26×39 312÷8
估算大约得几？怎样估算？
5、练习用计算器计算
63×7842
365×734 327180÷492
三、巩固练习：
1、 用计算器计算
3849+29563 739×254
24010-18925
297756÷919
6389×74 1572×639
51000-29814 25488÷236
2先用计算器计算下面各题，再找一找规
律。9999×1=9999
9999×3=
9999×4=
9999×9=
四、小结：计算器的使
用为我们带来了
许多的方便，通过使用计算器，你觉得
计算器如果具备哪些功能就更好了？不<
br>妨我们去找一找是否有具备这种功能的
计算器，该如何使用，更希望同学们能
利用自己的
聪明才智发明出更好的计算
工具。
五、作业：请你拿着计算器与妈妈一起
去买一次东
西。你帮助算一算应付的
钱。
9999×5=
由学生分小组演示
介绍）
这个键叫“开和清
除键”，它的主要
作用是用于计算的
开始和全部清除。
使学生掌握科学
型计算器使用的
一些初步知识，
满足数学学习和<
br>日常生活的需
要。
这个键叫做关闭
键。作用是用于停
止使用计算器。
学生估计得数
先输入题目，然后
按 = ，显示结
果。
使学生掌握计算
器的操作方法，
能正确、迅速地
用计算器进行计
算。
通过练习，激发
学生探索数
学奥
秘的兴趣，培养
学生观察、推理
的能力。
独立完成
独立计算，汇报，
小组内互相说怎样
算的？你想怎样验
算？
9999×7=
独立用计算器计算
后交流计算结果
计算后找规律。
9999×2=
板书设计： 计算工具的认识
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
算盘
计算器：Onc开和清除键 386+179
825-138
Off关闭键 26×39 312÷8
第十课时
课题 “一亿有多大”活动设计 课型 新授
教 知识与技能：1、通过收集信息、操作实验、讨论交流等活动，使学生在具
学
体情境中体验一亿的大小，发展数感，感受数学与现实生活的密切联系。
目
2、初步获得解决问题的一些策略和方法，发展学生解决问题的能力。
标
过程与方法：使学生经历在具体情境中体验一亿的大小的形成过程，理解数
的意义，建立数感。
情感、态度和价值观：
使学生获得成功的体验，初步树立运用数学解决问题的自信心。
重点
感知一亿的大小
难点
培养学生的数感。
教具 纸
教学教师导学 学生活动 教学意图
of responsibility system
for production safety; (B) the organizations
implement the relevant safety instructions,
important documents, coordinate and solve the
problems in the sector in the follow-up; (C) to
understand the safety, supervision, inspection,
safety, regularly receive reports safety
supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
过程 一、情境导入：
你们能想象1
亿有多大吗？猜想一
下，这节课上一节实践课：“一亿有
多大”活动设计（板书课题）
二、探究新知
阶段一：确立问题 设计方案
1、明确活动目的、要求。
以小组为单位，通过创设现实情境，
结合具体素材描述
一亿的大小，从中体会一亿的大小。
2、确立研究的问题。
例：一亿粒大米有多少？
一亿个学生在一起占用多大面积？
口算一亿道口算题需要多少时间？
一亿个硬币摞在一起有多高？
步行（汽车、飞机行驶）一亿米需要
多少时间？
几滴血中有一亿个红细胞？
一亿滴水有多少？
一亿双一次性筷子需要砍伐多少棵大
树？一亿张纸摞起来的高度
4、 定活动方案。
（1）活动步骤。
（2）活动准备和分工安排。
并把活动步骤、活动准备和分工安排
填写在活动记录表中。
阶段二：动手实践
各小组依据方案开展活动，并将获得
的数据、推算过 程补充记录在记
猜想一亿有多大
学生自由发言
学生叙说所要研究
的课题
学生研究一亿张纸
摞起来的高度。
分别测量100张纸
和1000张纸的高
度。
各小组交流实验方
案的环节
学生进行大胆
的猜测，激起
学生探究的欲
望。
通过收集信
息、操作实
验、讨论交流等活动，使学
生在具体情境
中体验一亿的
大小，发展数
感，感受数学与现实生活的
密切联系。
The first: to
implement e treatment, safe developmentch, protect
the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
录表中。教师参与到学生活动中有针
对性的指导、帮助。
阶段三：获得结论
学生根据对信息、数据的分析，
结合具体情境描述出一亿的大小。
阶段四：表达交流
1、各小组陈述整个活动过程。
2、 活动小结。
A 进一步想象一亿有多大。
B 对小组的活动过程进行评价。
三、小节
这节课有什么收获？
四、作业：
写一篇数学日记。
验证猜想。推出一
万张纸和一亿张纸
的高度。
交流感受，进行评
价
第二单元 角的度量
通过交流
，丰
富学生对1亿
有多大的感
受，使学生获
得成功的感
受，培养学生
沟通交流的习
惯。
第一课时
课题 直线、射线和角 课型 新授
教 知识与技能：
学
1、使学生认识射线，直线，能识别射线、直线和线段三个概念之间的联系
目
和区别。2、使学生认识角和角的表示方法，知道角的各部分名称。3、培养
标
学生观察、比较和概括的初步能力。4、培养学生关于射线、直线、线段和
角的空间观念。
2、过程与方法
通过观察、操作学习活动，让学生经历直线、射线和角的表象的形成过程。
3、情感态度和价值观：
体会到数学知识与实际生活紧密联系，能够感受到生活中处处学。
重点 角的意义
难点 射线、直线和线段三者之间的关系
教具
课件、活动角、尺或三角板
教师导学 学生活动 教学意图
一、认识射线，直线 学生汇报
教 1、复习线段的特点。 直直的，有两个端殿，
学
出示线段：它有什么特点？ 能测量
过 2、认识射线。 学生观察思考后汇报
程
（1）课件显示，学生感知线段一射线只有一个端点，向使学生认识射
端无限延长就得到一条射线。
一端无限延长。 线，直线，能
（2）射线有什么特点？ 学生自由发言
识别射线、直
（3）生活中你见过射线吗？ 手电筒发出的光线，太线和线段
指导学生用尺或三角板画射线。 阳射出的光线等等。
3、认识直线。
学生用尺或三角板画射
（1）课件显示，学生感知线段两线
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
端无限延长就得到一条直线。
（23）学生尝试画直线。
（4）线段和直线有什么关系？
4、线段、射线和直线三者之间
的联系和区别。
出示表格：以小组为单位填表
名图联区
称 形 系 别
线
段
射
线
直
线
小组汇报
5、练习，下面那些图形是线段、
哪些是射线、哪些是直线？
（P39、1）
引导想象
课件显示：从一点可以引出无数
条射线，为学习角作铺垫。
二、认识角
从一点引出的射线中留下两条，
问：这个图形认识吗？
什么叫做角？角该用什么符号表
示？下面我们来研究角。
1、你能举例见过的角吗？
学生举实例，教师随着学生举例
课件显示实物并抽象成各种形状
的角，让学生感知生活
中角的存
在。
2、建立角的概念。
(1)根据学生的发言总结画角的步
骤
：①画出一点，从这一点引出
一条射线；②从这一点再引出另
一条射线；③写出各部分名称。<
br>用∠1表示。
(2)问：到底什么叫角？总结角的
概念。
从一点到引出两条
射线所组成的
图形叫做角。这个点叫做和角的
顶点，这两条射线叫做角的边。
角的符号
用“∠”表示。
学生画直线
得出：线段是直线的一
部分。
小组合作填写表格。
全班交流汇报
学生独立判断后全班订
正
使学生弄清楚
三个概念之间
的联系和区别
学生认真观察。
学生回答：是角
学生汇报。
使学生掌握角
的概念、角的
学生举生活中角的实例
写法和角的画
法
学生独立画角
学生在小组内讨论交流
画角的的方法。
学生说角的概念及角的
符号。
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
三、巩固练习： 学生独立完成后全班汇
1、 P36“做一做”1、2 报订正
2、P39、2、
四、课堂小结
问：今天我们学习了什么内容？
你知道什么？
我们这节课研究了直线、射线和
角（板书课题：直线、射线和
角）
五、课后作业：P40、8
直线、射线和角
名
称
线
段
射
线
直
线
图
形
联系 区别
通过练习，
能
够把学到的知识
进行及时的巩固
复习。
板书
设计
都是直的 两个端点，可以度
线段是直线
的
一部分
没有端点
量
一个端点 无限
长
从一点到引出两条射线所组成的图形叫做角。
第二课时
课题 角的度量 课型 新授
教
知识与技能：
学
1、认识量角器、角的度量单位，会在量角器上找出大小不同的角，并知道
目
它的度数，会用量角器量角2、通过一些操作活动，培养学生的动手操作能
标
力。3、通过联系生活，使学生理解量角的意义。
过程与方法
通过观察、操作学习活动，形成度量角的技能，同时使学生经历和体验知识
的形成过程。
情感态度和价值观：
在学习过程中，感受数学与生活密切联系，激发学生学习数学的兴趣。。
重点 认识量角器，会用量角器量角
难点 认识量角器，会用量角器量角
教具
量角器、尺或三角板
教师导学 学生活动 教学意图
一、创设情境，引入课题。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
教
学
过
程
出示下列三种椅子问学生：你喜欢
坐哪种椅子，为什么？ <
br>学生回答后作如下小结：根据刚才
同学们的交流，看来椅子靠背的角
度不同，它的作用也
不同，像第2
种椅子就是专门给登月的宇航员设
计的，要造这样的椅子就要知道靠
背的
角度，你有办法知道它的角度
吗？(根据学生的回答板书课题：
角的度量)
二、自主探究，认识量角器。
1、认识量角器的中心、0刻度线、
内外圈刻度。
（1）师：量角用什么工具？
师：请大家仔细观察自己的量角
器，认真地研究研究，看看你有什
么发现。
（2）小组合作研究量角器。
（3）学生汇报研究的结果。注意
这里要尽量让学生说
出自己的想
法，有的问题还可以让学生来解
答。
教师根据学生的回答，要说明哪里<
br>是量角器的中心，哪里是0度刻度
线及内刻度和外刻度，量角器是把
半圆平均分成180
份等。根据回答
作出下列板书：中心、0度刻度
线、
内刻度和外刻度。(如果学生答
不
到量角器是把半圆平均分成180
份，教师可提下列问题启发：根据
量角器上的刻度
和数，你想一想量
角器是把半圆平均分成多少份
的？)
2、建立1°角的观念。 <
br>（1）让学生把量角器上平均分成
180份中的每一份所对的角用细丝
游戏棒（在一种塑
料扫帚上剪下
的）在课桌上摆一摆大约有多大。
（2）与学生共同讨论，得出同学
们刚才摆出的这个角就是1°角。
3、认识几度角。
（1） 在量角器上出示下列角，问
学生这是多少度的角，为什么？
学生思考后汇报
学生自由发表见
解。
量角器
学生观察自己的量
角器，小组合作研
究
全班交流汇报，学
生说出自己的想法
学生独立判断后全
班订正
从生活中让学生
感受到数学知识
的存在。
使学生认识量角
器的构造和角的
度量单位
学生回答：是角
学生汇报。量
角器是把半圆
平均分成180
份。
通过动手操作，
加深学生对1°
角的认识。
学生在课桌上摆一
摆
学生讨论
学生看书后，在量
角器上指出1°角的
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
（在量角器上画出20°的角，其中
每一个刻度都用虚线标出，便
于学生讲出为什么20°的道理，图
略）
（2）在量角器上出示60°、120°<
br>角（把角画在印在纸上的量角器
上）。和学生一起讨论为什么同一
个刻度，一个表示60
°，另一个却
表示120°？从而让学生谈谈在量
角器上读角时要注意什么？突破读
内
外圈刻度易错这一难点。
（3） 量角器上找出30°、
100°、135°的角。
三、尝试量角，探求量角的方法。
1、出示下列角（P37），问：这个
角你能读出
它的度数吗？（因为没
有标角的度数，所以学生读不
出）。接着问：要读出这个角的度
数该怎么办？指导学生实际操作，
按步骤去量角。
第一步，使量角器的中心点与
角的
顶点重合；第二步，使量
角器的零刻度线与角一条边重
合；第三步，看角的另一条边
所
对量角器上的刻度，就是这
个角的度数。教师边说明边演
示，巡视加以指导。
2、量出下列角的度数（P39、3）。
（突出第二个角的边不够长可以延
长边来量，要问学生为什么可以延
长边来量的道理）。
四、比较角的大小。
用量角器量下面的两组角，比较一
下它们的大小。（P38例1）
讨论：角的大小和什么有关？
总结结论：角的大小与角的两边画
出的长短没有关系。
角的大小要看
两条边叉开的大小，叉开得越大，
角越大。
五、巩固练习：
顶点及两条边。
学生说角的度数及
原因
学生读出角的度数
学生讨在量角器上
读角时要注意什么
学生在量角器上找
出角，并指出这些
角的顶点和两条
边。
学生合作完成，完
成后让学生反馈）
学生尝试测量，测
量后由学生做示范
（边量边说明是怎
样量的）。
学生再用量角器量
书上的两个角各是
多少度。
学生量后让其谈体
会
学生在小组内讨论
后，全班交流
使学生掌握读角
的方法
使学生掌握用量
角器量角的方
法。
使学生感悟角的
大小与角的两边
画出的长短没有
关系。
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
1、P38“做一做”
2、P39、4先估算每个角的度数，学生独立完成后全
然后验证。 班汇报订正
3、P40、6用一副三角板拼出下面
度数的角。
75° 105°
120° 135° 学生动手用三角板
150° 180° 拼角。
六、课堂小结
问：今天我们学习了什么内容？你
有什么收获？
七、课后作业：P40、5、7
通过练习，
能够
把学到的知识进
行及时的巩固复
习。
第三课时
课题 角的分类 课型 新授
知识与技能：
教
1、学习角的分类，使学生学会根据角的度数区分直角、锐角、钝角、平角和周角，
学
并知道直角、平角和周角的关系。2.初步培养学生自主探索的学习能力
目
过程与方法
标
通过观察、操作学习活动，让学生经历平角和周角形成过程，并根据角的度数加以
区分
情感态度和价值观：
体会到数学知识与实际生活紧密联系，激发学生学习数学的兴趣。
重点
难点
教具
教
学
过
程
区分直角、锐角、钝角、平角和周角
培养学生自主探索的学习能力
量角器、活动角、尺或三角板；各种角的学具
教师导学
一、 导入：
师：最近讲了什么知识？（角的知识）
谁愿意说说什么叫做角？
师打开一个口袋，里面是各种角：
学生活动
学生汇报：角的
知识
学生回答角的概
念
教学意图
复习角的有关知
识，为学习新知
识作准备。
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
2
1
学生观察汇报
3
分类
5 6
学生汇报
比直角大，比直
角小，直角
学生小结
4 比直角大的角是
钝角，比直角小
师：我们每组都准备了许多角，面对这的角叫锐角
些角，你们打算怎么研究？（分类）
二、探究新知：
1．以小组为单位把每组的角进行分类。
学生画直角，并
师：你们是怎么分的？为什么这样分？ 你说明算法。
们知道比直角大的角、比直角小的角叫什
么角吗？
学生边小结什么是直角、锐角、钝角。
三角板、量角
板书：锐角：小于90°直角：等于90°钝器、折，借助有
角：大于90°
直角的物品画。
2．你们是按角的度数进行分类的吗？
师：你们量了吗？量一量。这些角
各有什同桌检查画的对
么特点？在这三类角中，哪一类角比较特不对
殊？（直角）你能说出身边有哪些是直
角？
3．请选择适当的学具，每人画一个直角。
指名汇报，你选择了什么学具？怎么画学生自由汇报后
的？ 看书自学
4．用最快的速度画一个锐角、一个钝角。
指出你用什么方法帮同学检查的？（板
书：目测、量、比三角板）
动手操作折出平
5．小结：以90°的直角为标准，来判断角、周角。
锐角、钝角，所以直角很重要。（出示一个
直角贴在黑板上）
小组讨论交流后
6．认识平角和周角。 全班汇报
①师：除了这些角，你们还知道什么角？
你对平角、周角有什么认识？打开书
P41，自学例2. 学生补充说明钝
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversig
the company; the shop,
the team has no independent oversight bodies, must
be full time or part time security officers,
safety supervisors, workplace safety, team
security officer grade safety net. 20th: carbon
company's safety oversight body by the Executive
... Serving as. 22nd: the responsibility of
security: (a) monitor implementation of
responsibility system for production safety at all
levels of the entity supervising the safety
regulations, accident prevention measures and the
implementation of relevant safety instructions;
(B) monitoring involves the technical condition of
equipment, facilities, security, personal security
protection status; found in the supervision and
inspection of key issues and risks, to release
security notice in a timely manner
withi
supplies, security equipment, security,
acquisition, distribution and use of protective
equipment; (D) to oversee the implementation of
safety training program organized or cooperate
with the security examination of the work
procedures and safety culture; (E)
②请同学们拿出活动角，动手折出平角、角的概念
周角。
板书：平角：等于180°周角=360° 学生独立判断比
通过将角进行分
类，加深对角的
理解。
使学生掌握画角
的方法
通过自学掌握平
角和周角的概
念。
使学生知道直
角、平角和周角
的关系。
使学生学会根据
角的度数区分直
角、锐角、钝
角、平角和周角
通过练习，能够
把学到的知识进
行及时的巩固复
习。
ncy plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in
t
or safety supervision authority on business
leadership, qualification and personnel of
institutions eligible to receive superior safety
review of the supervisory authority. 19th: full-
time security oversight
nd report to the
supervisor; (C) the Organization preparing the
security plan of technical protecton measures and
supervision requirements for extraction and use,
monitoring the implementation
14th:
body
of
bor
unit's production emergencies
emergehe relevant safety regulations.
ht
functions. Safety supervisory body superi
n a
solution, aof the plan of supervising
la
第四课时
课题 角的画法和
角的巩固练习 课型 新授
教
知识与技能：1、使学生会用量角器按指定度数画角，并通过练习进一步巩
学 固角的有关知识。2.
培养学生动手操作能力及分析、推理的能力。3、培养
目 学生自学能力。
标 过程与方法
通过学习，使学生经历画角和练习的全过程，进一步巩固角的有关知识。
情感态度和价值观：
使许感受数学知识与实际生活紧密联系，体会学习数学的乐趣。
重点
会用量角器按指定度数画角
难点 培养学生动手操作能力
教具
量角器、活动角、尺或三角板
教师导学
一、复习检查
教
学
1、说出下面的
过
程 角各是哪一种角。
学生活动
学生说出角的名
称。
学生汇报：量角器
学生自学画角的方
法，自己尝试画角
汇报画角的方法
学生画指定度数的
教学意图
复习所学的角的
有关知识，，为
学习新知识作准
备。
使学生掌握画角
的方法，培养学
生作图的能力。
2、我们已经认识角，会用量角器量
角，会进行角的分类，怎样画角
呢？今天我们来学习画角。
板书课题：画角
二、探究新知
1、教学角的画法
问：量角的工具是什么？
说明要画一个指定度数的角，也要
用量角器来画。
出示例题：画一个65°的角
（1）请同学自学角的画法，书P42
（2）试一试
让学生拿出量角器、铅笔、练习
The first: to
implement e treatment, safe developmentch, protect
the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
本，按书上的步骤一步一步地画一角，同桌用量角器
画。
帮助检查度数是否
说一说 准确。
请学生说说你是怎么画的？学生一
边说，教师在黑板上示范，最后教
师讲解说明。
2、做一做（P42、2）
分别画出75°、105°的角
让一名较好的学生板演，其余学生
在练习本上画。教师巡视，注意画画完后，说说画角
的步骤。 的步骤。
三、巩固练习
1、P43、2选择合适的方法画出下
列各角，并说说它们分别是哪一种
角。 学生画角并判断是
10° 45°
60° 90° 什么角。
105° 120° 全班订正
2、P44、6用一副三角尺，分别画
出15°、75°、150° 165°的
角。 学生画出指定的
四、课堂小结 角，并互相检查
这节课我们学习了什么？你有什么
收获，说一说。
五、课后作业：
P44、7
画角
加强量角和画角
的沟通与联系
通过练习，
能够
把学到的知识进行
及时的巩固复习。
板书
设计
第三单元
三位数乘两位数
第一课时
课题
口算乘法（例1）
教
学
目
标
课型 新授
知识与技能：
1、使学生在理解的
基础上，掌握整数乘法的口算方法。2、培养学生类推迁
移的能力和口算的能力，
过程与方法：
情感、态度和价值观：使学生经历整数乘法口算方法的形成过程，体验解决
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
问题策略的多样性。
1、培养学生养
成认真计口算的良好学习习惯。2、使学生感受到数学源于生
活，培养学生积极思考的习惯
重点 掌握整数乘法的口算方法。
难点 培养学生养成认真思考的良好学习习惯。
教具
教
学
过
程
图片、题卡
教师导学
一、 创设情境：
1、你们想知道一些交通工具的运
行速度吗？（出示六种交通工具的
时速的图片）
2、你还知道其他交通工具的速度
吗？
二、探究新知：
1、出示例1
人骑自行车１小时约行１６千米。
特快列车１小时约行１６０千米。
1）人骑自行车３小时可以行多少
千米？
提问：计算这道题时怎样想？怎样
列式？如何计算？
小组交流讨论。小组汇报
问：30小时行多少千米？
练一练：
18×4= 24×3=
25×2= 14×6=
2） 特快列车３小时可以行多少
千米？怎么列式
提问：计算这道题时怎样想？在小
组内交流一下。
组织学生汇报交流。
比较两种方法，你认为哪种方法简
便？
练习：130×5= 2×380=
150×6=
7×13=460×2=
口算乘法的方法是什么？
师生归纳总结口算方法；
学生活动
学生看图片
汇报查找的一些交通
工具的运行速度。
16×3=
小组讨论口算方法，
汇报
方法1：想
10×3=60，
3×6=18 ，
30+18=48，所以
16×3=48
方法二：16
× 3
--------
48
学生独立完成，汇报
口算方法：16×30先
用16×3=48，再在积
的末尾填写一个0得
480
10×30+6×30=480
160×3想
100×3=300，
3×60=180
，
300+180=408，所以
160×3=480
因为16×3=48，所以
160×3=480
独立完成后汇报交流
小组讨论交流汇报
教学意图
使学生在熟悉
的情境中，激
发探究的
欲
望，为后面的
数量关系作准
备。
使学生掌握整
数乘法口算的
方法，体验解
决问题策略的
多样性
在对比中归纳
出简便算法。
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
一位数与几百几十相乘，先乘0前
面的数，再在乘积的后面添上一个
0
引导学生学会
板书课题：口算乘法 学生独立口算，说一有序思考的方
三、巩固新知：
说计算的过程。 法。
1、练习六第1题 独立完成，反馈结果
将得数写在树叶旁边。
独立完成后汇报
2、、练习六第1题和第2题
应用乘法口算解决实际问题。
通过练习，
能
够把学到的知识
3、练习六第4题和第5题
进行及时的巩固
口算练习
四、总结
复习。
提高学
今天你学会了什么？ 生的口算能力
五、作业：
第48页6-----9
第二课时
课题 笔算乘法（例1） 课型 新授
教 知识与技能：：
学 1、使学生掌握三位数乘两位数的笔方法。2、培养学生类推迁移的能力和口
目 算的能力
标 1、 过程与方法：使学生经历笔算乘法计算的全过程，掌握算理和计算的方
法
情感、态度和价值观：
培养学生认真计算的良好学习习惯。
重点
使学生掌握三位数乘两位数的计算方法
难点 使学生掌握三位数乘两位数的计算方法并正确计算
教具 图片、
教师导学 学生活动 教学意图
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
教学
过程
一、复习导入；
1、口算：
152×2= 231×4= 321×2=
415×3= 298×3= 523×3=
2、笔算
24×12=
44×59= 63×52=
说一说笔算的方法是什么？
3、这节课继续学习笔算乘法
板书课题：笔算乘法
二、探究新知．
例1.李叔叔从某城市乘火车去北京
用了１２小时，火车１小时约行
145千米。该城市到北京大约有多
少千米？
问：说一说这题如何列式？这是一
道什么样的乘法算式？
板书课题补充；三位数乘两位数
145×12估计一下大约是多少？
怎么计算出准确的结果？
能不能用我们以前学过的旧知识来
解决这道题，自己试一试。
问：先算什么？再算什么，积的书
写位置怎样？最后算什么？
145×12=1740
145
× 12
-------
290
1 45
-------
1 740
问：如何检验自己的运算结果？
小结：，三位数乘两位数笔算的方
法是什么？师生归纳
两位数乘法，先用一个乘数个
位上
的数去乘另一个乘数，得数的末尾
和个位对齐；再用这个乘数十位上
的数去乘另一
个乘数，得数的末尾
和十位对齐，最后把两次乘得的积
加起来。
三、巩固练习：
1、书后做一做
134×12= 176×47 425×36
学生口答结果
指名板演，其他学
生在本上完成。
小组讨论交流计算
的过程
145×12
三位数乘两位数
说出估算的方法
150×10=1500，
150×2=300，比
1800
米少一些。
可以用口算的方
法。
用笔算比较准确。
学生尝试计算。
小组讨论交流计算
的过程
用自己的话说一说
计算的过程。
先算145×2，再算
145×10
两部分积的相同数
位对齐，最后想加
便的结果。
用学过的计算工
具，计数器来验
算。
学生总结计算方法
学生独立计算后，
复习计算知识，
为学习新课作准
备。
使学生通过自主
探索，，掌握三
位数乘两位数的
计算方法
使学生学会有序
地操作和思考，
有条理地解决问
题。
教
学
过
程
培养学生归纳概
括的能力
通过练习，巩固
三位数乘两位数
的笔算方法。提
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
237×82
2、练习七的1、2独立完成
四、课堂总结
今天你都学会了什么？有什么收
获？
五、作业：练习七第3题
用计算器自行检
查。
独立完成后，展示
过程。
高学生的计算能
力。
第三课时
课题 笔算乘法练习 课型 练习
教 知识与技能：：
学 1、巩固三位数乘两位数的笔算的方法。2、培养学生的计算能力，形成计算
目 的技能。
标 过程与方法：使学生经历巩固笔算乘法计算的全过程，进一步巩固算理和计
算的方法
情感、态度和价值观：
1、培养学生认真计算的良好学习习惯。2、感受所学知识的应用价值，增强
应用意识。
重点 巩固三位数乘两位数的计算方法
难点 使学生能正确、熟练地计算
教具
题卡
教 教师导学 学生活动 教学意图
of responsibility
system for production safety; (B) the
organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
教
学
过
程
一、
复习导入；
1、口算
28×3= 16`×8= 36×2=
46×20=
4×160= 3×150=
150×6= 26×7= 20×19=
200×73= 900×24= 430×8=
15×6= 190×5=
口算的方法是什么？
2、笔算
322×24= 145×27= 679×13=
286×35
笔算乘法的计算方法是什么？
板书课题：笔算乘法练习
二、练习内容：
1、判断并改错。
134 152 246
× 16 × 23 × 34
---—— ———— ————
804 156 964
134 104
638
———— ———— ————
938 1196
7344
说一说找到的错处和纠正的结果、错的原
因和怎样避免。
笔算时应注意什么？
2、笔算
124×73= 46×215=
224×36=
28×153= 27×142= 182×47=
笔算的方法是什么？
3、解决问题
1）学校准备发练习本，发给15个班，每班144本，还需要留40本作为备用。学校
应买多少本？
2）一场电影有观众806人，照这样计算，
放映32场共有观众多少人？
3）有8个班做体操，平均每行24人，站
了12行，共有多少人？
4）学校要为图
书馆增添两种新书，每种3
套，儿童百科每套125元，数学大全每套
18元，一共要花多少钱
？
5）书上练习七第8题
四、思维训练
探究一下正确的积是多少。
学生口答结果
指名板演，其他
学生在本上完
成。
找出错因并及时
改正
独立计算后全班
订正
独立完成后全班
订正
独立分析题中给
出的信息数据和
问题，独立解决
问题
读懂题意，独立
分析解答，
全班汇报。
填写表格，交流
汇报。
复习计算知
识，为下面
练习作准
备。
通过练习，，
巩固三位数
乘两位数的计算方法，
提高学生的
计算能力。
培养学生用
所学的知识
解决实际问
题的能力。
感受所学知
识的应用价
值，增强应
用意识。
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案 1、小量做了一道乘数是两位数的乘法题，
他把乘数18看成了15，结果得到的积比
正确
的积少609，那么正确的积是多少？
2、练习七第12、13思考题
四、课堂总结
今天你都学会了什么？有什么收获？
五、作业：练习七第10、11题
全班讨论交流
全班讨论交流
通过观察、
计算、猜
想、验证等
操作和思维
活
动，培养
探究和归纳
的能力。
第四课时
课题
因数中间 或末尾有0的乘法
课型
（例2）
教
学
目
标
新授
知识与技能：：
1、使学生
掌握因数中间或末尾有0的计算方法，进一步认识0在乘法运算
中的特性2、培养学生类推迁移的能力和
计算的能力
过程与方法：使学生经历因数中间或末尾有0的计算的过程，进一步掌握算
理和计算的方法
情感、态度和价值观：
培养学生认真计算的良好学习习惯。
重点
掌握因数中间或末尾有0的计算方法
难点 掌握竖式的简便写法
教具 图片、
教
教师导学 学生活动 教学意图
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、复习导入；
1、 口算
40×72= 600×300=
30×23=
53×30= 20×700= 40×22=
40×72=
40×72= 40×72=
20×20= 40×90= 502×7=
608×5= 908×4= 400×50=
2、笔算
708×6=
790×8= 54×278=
说一说笔算的方法是什么？
3、这节课继续学习笔算乘法
板书课题：笔算乘法
教
学
过
程
学生口答结果
指名板演，其他
学生在本上完
成。
读题理解题意
160×30=
106×30
二、探究新知．
例2、特快列车１小时可行160千米。普
通列车１小时可行１06千米它们30小时
学生尝试计算。
各行多少千米？。
小组讨论交流计
问：说一说这题如何列式？这是一道什么
算的过程
样的乘法算式？
用自己的话说一
板书课题补充；因数中间
或末尾有0的乘
说计算的过程。
法
汇报：可以用口
怎么计算出结果？能不
能用我们以前学过
算计算先算
的旧知识来解决，自己试一试
160×3=480，再
在积的末尾再添
学生独立进行计算。
1个0。
请不同算法的学生说一说口算的过程。
或：16×3=48，
1）160×30=
问：写竖式时，如何处理0
再在积的末尾添
和非0数字的对位问题？怎样确定积的末
写
2个0
尾0的个数？
思考并回答
160×30=4800
可以用笔算的方
160
法，叙述计算的
× 30 过程
—————
4800
2）106×30= 自己试一试
学生反馈时讨论： 学生尝试计算
（1）竖式的简便写法，为什么不写成106
× 30
————
（2）计算106×30时，既然中间的0与3
相乘得0，那么这个过程可以不要吗？如
何写这一位的积？
汇报计算过程，
106×30=3180 思考并回答问题
复习计算知
识，为学习
新课作准
备。
使学生通过
自主探索，
掌握因数中
间或末尾有
0的计算方
法
掌握竖式的
简便写法
通过对比，
使学生进一
步理解，利
用0在乘法
运算中的特
性能使计算
简便。
培养学生归
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
106
× 30
——————
3180
计算时哪个竖式更简便？
小结：，因数中间或末尾有0的计算方法是
什么？师生归纳
先把0前面的数相乘，乘完以后再看乘数
末尾共有几个0，就在乘得的数的末尾填
写几
个0
三、巩固练习：
1、书后第53页做一做
2、练习八的1、2独立完成
四、课堂总结
今天你都学会了什么？有什么收获？
五、作业：练习八第3、4、7题
学生独立计算
后，用计算器自
行检查。
独立完成后，展
示过程。
概括计算方法
独立正确地进行
计算
全班汇报
纳概括的能
力
通过练习，
巩固竖式的
简便写法，
提高学生的
计算能力。
第五课时
课题
速度、时间和路程之间的关系（例
课型
3）
教
学
目
标
新授
知识与技能：：
1、使学生理解速度的概念，掌握速度×时间＝路程这组数量关系。学会速
度的写法
过程与方法：引导学生自主探索 速度×时间＝路程这组数量关系，并应用
它去解决问题
情感、态度和价值观：
提高学生学习的兴趣，扩大认知视野，使学生感受人类创造交通工具的
智慧
和自然界的多姿多彩。
重点 理解速度的概念，掌握速度×时间＝路程这组数量关系
难点 应用数量关系解决实际问题
教具
教 教师导学 学生活动 教学意图
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、 情境导入：
1、出示交通工具的时速的图片，介
绍学生未知的交通
工具（陆、海、空
到宇宙方面）的运行速度，自然界一
些动物的运行速度等等
2、你还知道哪些运行速度？学生展
示搜集的信息
二、探究新知
1、教学速度的概念，学会速度的写
法，
1）人骑自行车１小时约行1６千学生叙述
米。
我们把人骑自行车1小时行的路程叫
做速度
还可以说成：人骑自行车的速度是每
小时１６千米。可以写成１６千米／
普通列车的速度是
时。（用统一的符号表示速度）
每小时１０６千
2）普通列车每小时行１０６千米。
米。特快列车的速
特快列
车每小时行１６０千米。
度是每小时１６０
小林每分钟走60米
千米。
师：还可以怎么用数学语言叙述？
小林步行的速度是
这些用符号怎么写呢？
每小时６０米。
师：每小时，每分钟都表示单位时独立写出订正。
间。单位时间可以是每小时、每分
钟、每秒、每日等等
学生写出自己熟悉
3）试着写出其他交通工具的速度。
的交通工具的速
2、速度、时间和路程之间的关系 度，在班上交流。
一辆汽车的速度是８０千米／时，２
小时可行多少千米？
80×2=160（千米）
学生阅读
展示事先找的图片
汇报
。
创设情境，提
高学生的学习
兴趣，扩大学
生的认知视
野。
使学生理解速
度的概念，学
会速度的写法
使学生掌握速
度×时间＝路
程这组数量关
系。
通过练习，加
深学生对单位
时间、速度的
理解
教
学
过
程
李老师骑自行车的速度225米／分，
每位学生写出关系
式。
１０分钟可行多少千米？
225×10=2250（千
独立计算并找出速度、时间和路程之
米）
间的关系是怎样的？
改变其中一题，求时间或者求速度。
全班交流，展示自
问：你能发现速度、时间与路程有什
己的关系式
么关系吗？
三、巩固新知
速度×时间=路程
1、猎豹奔跑的速度可达每小时110
千米，可写作——
2、蝴蝶的速度每分钟500米，写作
——
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
3、声音传播的速度是每秒钟340
米，写作——
4、小强每天早上跑步15千米，
他的
速度大约是120米分，小强每天大
约跑步多少米？
5、练习八第8、9题
四、课堂总结
今天你都学会了什么？有什么收获？
五、作业：练习八第10题
独立完成汇报
写数量关系，列式
计算
独立完成
巩固速度×时
间＝路程这组
数量关系，并
应用它去解决
问题
第六课时
课题
积的变化规律 课型 新授
教
知识与技能：1、学生通过观察，能够发现并总结积的变化规律。2、
学
过程与方法：使学生经历变化规律的发现过程，感受发现数学中的规律是一
目
件十分有趣的事情。2、尝试用简洁的语言表达积的变化规律，培养初步的
标
概括和表达能力。3、初步获得探索规律的一般方法和经验，发展学生的推
理能力。
情感、态度和价值观：
培养学生初步的抽象、概括能力及善于观察、勤于思考、勇于探索的良好习
惯。
重点
引导学生自己发现并总结积的变化规律。
难点 引导学生自己发现并总结积的变化规律。
教具 图片
教 教师导学 学生活动 教学意图
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、研究“两数相乘，其中一个因数
变化，它们的积如何变化饿规律。
1、研究问题，概括规律
（1）两数相乘，一个因数不变，另
一个因数乘几时，积怎么变化。
学生完成下列两
组计算，想一想发现
了什么？你能根据每组算式的特点接
下去再写两道算式吗？试试看
6×2= 8×125=
6×20= 24×125=
6×200= 72×125=
组织小组交流
归纳规律：两数相乘，当一个因数不
变，另一个因数乘几时，积也要乘
几。
（2）两数相乘，一个因数不变，另
一个因数除以几时，积有怎么变化？
学生完成下列两组计算
，想一想有发
现了什么？
8×4= 25×160=
40×4=
25×40=
20×4= 25×10=
引导学生概括：
两数相乘，当一个因数不变，另一个
因数除以几时，积也要除以几。
（3）整体概括规律
问：谁能用一句话将发现的两条规律
概括为一条？
引导学生总结规律。
2、验证规律
1）先用积的变化规律填空，再用笔
算或计算器验算。
26×48=
17×12=
26×24= 17×24=
26×12=
17×36=
自己举例说明积的变化规律
3、应用规律
完成例4下面的做一做和练习9的
1-——4题
二、研究“两数相乘，两个因数都发
生变化，积变化的规律“。
1、独立思考，发现规律
完成下列计算，说规律。
观察算式。
学生将发现的规律
说给自己的同伴
听。
全班汇报交流发现
的规律，并说说自
己是怎么想的
说明写算式的理由
学生讨论因数变化
的规律
汇报交流规律
两数相乘，一个因
数不变，另一个因
数乘（或除以）
几，积也要乘（或
除以）几。
学生填空并验证
使学生通
过观
察，计算、思
考、对比，能够
自主发现并总结
因数变化引起的
积
的变化规律
尝试用简洁的语
言表达积的变化
规律，培养初步
的概括和表达能
力
教
学
过
程
每位学生各写两组
算式，一组3个。
完成计算，并述说
自己发现的规律
初步获得探索规
律的一般方法和
经验，发展学生
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
18×24= 的推理能力。
（18÷2）×（24×2）=
（18×2）×（24÷2）=
105×45
（105÷5）×（45×5）=
（105×3）×（45÷3）=
2、组织全班交流，概括规律 学生概括规律
两数相乘，一个因数乘（或除以）独立填写各
题的培养学生用数学
几，另一个因数除以（或乘）几，它商，再交流自己的语言表达数学结
们的
乘积不变。 想法。 论的能力
三、巩固新知
1、书上练习九的1、2、3
2、一个长方形的面积是256平方厘 通过练习，进一
米，如果长缩小到原来的
，宽扩大独立解答后交流汇步巩固积的变化
到原来的4倍，这个长方形就变成了报。
规律，并能应用
正方形，这个正方形的面积是多少？ 规律解决问题。
它的边长是多少？
五、总结 讨论交流后说明思
这节课有什么收获？ 路。
六、作业：第59页4、5
板书 积的变化规律
设计 （1） 6×2= 8×125=
（2） 8×4= 25×160=
6×2
24×125= 40×4= 25×40=
6×200=
72×125= 20×4= 25×10=
两数相乘，一个因数不变，另一个因数乘（或除以）几，积也要乘
（或除以）几 。
第七课时
课题 乘法估算（例5） 课型 新授
教 知识与技能：：
学
1、使学生掌握乘法估算的方法,会进行乘法估算。2、培养学生估算的意识,
目
归纳概括、迁移类推的能力,以及应用所学知识灵活解决实际问题的能力.。
标
过程与方法：使学生经历学习乘法估算的全过程，掌握估算的基本方法。
情感、态度和价值观：
培养学生认真审题的良好学习习惯。
重点
掌握乘法估算的方法,会进行乘法估算。
难点
培养学生估算的意识,
灵活解决实际问题的能力.。
教具 图片、
教 教师导学 学生活动 教学意图
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、创设情景，引入新课
师：学校组织秋游活动，我们四年
级同学去××
公园，去那里的费用
是每人４９元，包括客票和公园门
票，四年级全年级共有１０４人，
老师大约应该准备多少钱呢？
出示图片：
二、探究方法，学习新知:
1、师：你们能帮老师估算一下大
约应该准备多少钱吗？
1）独立估算，并写出估算过程
2）小组内学生交流各自的估算方
法和结果。并说明理由。
3）全班交流。反馈学生估算结果
鼓励学生说出多种想法。
4）对估算结果进行评价
师：你认为谁估计得更接近准确的
钱数呢？为什么？
5000元更好些。
让学生尽量说出自己的想法
在估算的时候你是怎么做的？ <
br>小结：接近准确值（符合实际）；
计算方便（将两个因数看成整十、
整百或几百几十的数
）
２．运水公司为居民运送纯净水，
一月份运送７１８桶，照这样计算
的话，估算一
下，全年可以运水多
少桶？
教
学
过
程
三、巩固新知
１． 你是怎样估算的？
《新编小学生字典》有592页，大
约是（ ）页。
小明每分钟打字108个，大约是
（ ）个。
本校有学生688个人，大约是
（ ）人。
李平大叔今年收橘子1328千克，
大约是（ ）千克。
2小明同学走一步的平均
长度是62
ｃｍ，他从操场这头走到那头共走
了252步。操场大约长多少米？
ａ1800米 ｂ1200米 ｃ1500米
学生读题理解题意，找
出信息和问题
小组内学生交流计算。
反馈学生估算结果：
ａ.49元大约是50元，
四
年级全年级共有104
人，大约是100人。
50×１00＝5000元，老
师准备5
000元就够
了。
ｂ.49元可以看作是50
元，全年级的104人可
以看
作是110人。
50×110＝5500元，应
该准备5500元。
可以
利用四舍五入法，
把一个数看作是一个接
近整十整百的数，再去
相乘，计算出大约的<
br>数。
学生独立估算，小组交
流，全班汇报方法。
学生独立估算，全班汇
报
创设情境，
激发兴趣，
为学习新课
作准备。
使学生掌握
乘法估算的
方法,会进行
乘法估算
培养学生估
算的意识,归
纳概括、迁移类推的能
力,以及应用
所学知识灵
活解决实际
问题的能
力.。
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
3沙坪小学有学生612人，全乡有
这样的小学19所，全乡约有多少
名小学生？
燕鸥从北极飞到南极行程是17000
千米，如果他每天飞780千米，20
天能飞
到吗？
4、第62页的5、6、7
四、小结：
通过这节课的学习，你有什么
收获和体会？
五、作业：第63页8、9、10、
11、12
列出乘法算式，写出估
算过程，汇报估算结
果。
独立找估计的方法，交
流各自估计的结果。
培养学生认
真审题的良
好习惯。
第四单元
平行四边形和梯形
第一课时
课题
垂直和平行６４－６５页
教
学
目
标
知识与技能：
课型 新授
1、让学生结
合生活情境，通过自主探究活动，初步认识平行线、垂线。2、
通过讨论交流，使学生独立思考能力与合
作精神得到和谐发展。3、在比较
分析、综合的观察与思维中渗透分类的思想方法。
过程与方法
通过观察、操作学习活动，让学生经历认识垂直与平行线的过程，掌握其特
征。
情感态度和价值观：
培养学生学以致用的习惯，体会数学的应用与美感，激发学生学习数学的兴
趣、增强自信心。
重点
通过学生的自主探究活动，初步认识平行线与垂线。
难点
理解永不相交的含义
教具
教
学
过
程
铅笔、小棒、展示板、三角板、直尺、手工纸、挂图学具准备：
教师导学
一、创设情境，引入新课
通过创设情境，联系生活，提出问
题：两根铅笔落在地上后可能会形成
哪些图形？
二、探索比较，掌握特征
（一）动手操作，反馈展示。
1、每个同学先独立思考，把可能出
现的图形用铅笔摆一摆，摆完后，小
教学意图
学会自由发言
创设情境，联系
生活，激发学生
的学习兴趣
学生用铅笔摆图
学生活动
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
组长组织大家把可能出现的图形用小形，分组讨论
棒摆在展示板上。
2、教师巡视，参与讨论，了解情
况。
学生在全班汇报，
3、集中显示典型图形，强化图形表
补充说明
征。
（1）展示其中一个小组的展示板。
（2）除了展示板上的这几种情况，
其他小组还有补充吗？
（二）小组讨论交流，探索图形特
征。
1、整理图形，把其中
具有代表性的
学生认真观察，思
图形通过电脑课件来展示，并编上序
考分类方法
号。这些图形，同学们能不能对它们
进行分类呢？可以分成几类？为什么
这样分？
在比较分析、综
合的观察与思维
中渗透分类的思
想方法。
2、尝试把摆出的图形进行分类。（教
汇报分类方法及分
师参与讨论，强调学生说明分类的标
类标准。
准）
通过操作，使学
3、把铅笔想象成直线，再次分类。
学生再次进行分生体会两条直线
4、根据研究需要，按照“相交”和
类。
的位置关系有相
“不相交”的标准进行分类。
交”和“不相
师：同学们，我们在对物体进行分类
交”两种情况
时，可以有不同的分类标准，也就有
了不同的分类结果。根据我们今天这
堂课研究的需要，如果按照“相交”
学生小组讨论后交
或者“不相交”来分的话，大家认为
流自己的想法
应该怎样分？
（三）归纳特征，构建新知
1、通过同学们自己的探索研究，我
们发现了在同一平面内，两条直线的
相互位置关系的两种不同情况：一种
认识平行线的本
是相交，一种是不相交。
质特征，理解永
2、再次分类，并归纳“平行”与
学生归纳“平行”不相交的含义。
“垂直”的特征，让学生质疑。
与“垂直”的特
3、今天我们就要一起来认识认识平
征，并提出问题。
行与垂直。（揭示课题）
4、其实我们天天都在和垂线与平行
线打交道。你们看：书本面相邻的两
边是互相垂直的，相对的两边是互相
平行的。同学们，你们还能找一找、
The first: to
implement e treatment, safe developmentch, protect
the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案 想一想你的身边还有哪些物体的边是
互相垂直的，哪些物体的边是互相平
行的？找到后快快
把你的发现告诉同
组的同学
5、学生试着说概念
师归纳总结并板书。互相平行和互相
垂直、垂线和垂足的概念
三、解释应用，巩固新知
（一）折纸
1、同学们已经找到了生活中很多的
平等线与垂线，那要是给每个同学一
张这样的不规则纸，你们能动手折一
折，折出垂线与平行线
吗？这可有一
定难度，愿意接受挑战吗？
2、学生动手折垂线，教师巡视，进
行个别指导。
3、大家都折出垂线了吗？哪个小老
师愿意向全班同学展示一下你是怎样
折的？ 4、请在刚才折的基础上，再折一
折，使两条折痕互相平行。有困难
的，可以和小组同学讨
论讨论。
5、学生演示。
师：大家可真不简单，能够动手折出
垂线和平行线！现在
，请迅速把这些
纸收好。这几个小组的动作可真快，
看来，你们已经养成了良好的学习习
惯！
（二）拓展练习：贴挂图69页7题
四、全课总结，完善认知
同学们，你觉得这节课里你表现
怎样？你有什么收获和体会？五、课
后作业：P65
1、2
学生举生活中的实
例，单杠、双杠等 使学生掌握互相
平行和互相垂直
的含义
学生试着说概念
学生动手折出垂线
与平行线 通过动手折一
折，加深对概念
的理解，培养学
生动手操作的能
力。
学生展示作品，交
流折的方法。
有困难的，可以和
小组同学讨论讨论
后再折一折
培养学生良好的
学习习惯
学生收拾学具
学生先独立思考在
讨论交流
培养学生思维的
灵活性。
垂直和平行
在同一平面内不相交的两条直线叫做平行线，也可以说这两条直线互相平行。
如果两条直线相交成直角，就说这两条直线互相垂直。其中一条直线叫做另一条直线
的
垂线，两条直线的交点叫做垂足。
of responsibility system
for production safety; (B) the organizations
implement the relevant safety instructions,
important documents, coordinate and solve the
problems in the sector in the follow-up; (C) to
understand the safety, supervision, inspection,
safety, regularly receive reports safety
supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
第二课时
课题
画垂线66页
教
学
目
标
知识与技能：
课型 新授
1、 使学生明确垂线的重要性质，直线外一点到这条直线间的距离垂线最
短。学会用三角板准确的画垂线。2、培养学生良好的学习习惯。初步培
养学生空间想象能力。
过程与方法
通过动手操作活动，使学生经历画垂线的过程，培养学生的作图能力。。
情感态度和价值观：
通过活动，让学生从中感受到学习的乐趣，体会到成功的喜悦，从而提高学
习的兴趣。
重点
学会用三角板准确的画垂线
难点
准确的画出垂线。使学生明确垂线的重要性质，直线外一点到这条直线间的
距离垂线最短。
教具
三角板、直尺
教师导学 学生活动 教学意图
一、复习导入：
教 1、回忆一下，你记得什么叫垂直吗？ 学生回忆所学
学
2、看我们的数学书，每两条边都是怎样知识，并汇报 复习旧知识，
过
的？怎样用三角板画垂线呢？这节课我们 为学习新课做
程 来学习画垂线 准备
板书课题：画垂线 互相垂直
二、探究新知
1、过直线上一点画这条直线的垂线
三角板上有一个角是直角，通常可以用三
角尺来画垂线。
１）
先画一条直线。 学生认真观察
2）把三角板的一条直角边与这条直线重
使学生学会用
合，沿着另一条直角边画出的直线就是前
三角板准确的
一条直线的垂线（直角顶点是垂足）。
画垂线的方
强调：让三角板的直角顶点落在给定的这 法，培养学生
点上。
学生尝试画垂作图的能力。
过直线外一点画这条直线的垂线： 线
画线前让三角尺的另一条直角边通过这个
已知点。
强调：
一般用左手持三角板，右手画线。当要求学生叙述画垂
直线通过其一点时，要考虑到笔画的粗细线的步骤
度，三角板的边与已知点之间可稍留一些
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
空隙。
学会画垂线的
教师讲解示范后，学生自己动手尝 技巧
试着画一个，然后互相交流一下。
1）过直线外一点画这条直线垂线，该怎么
画呢？
学生动手尝试，小组内交流。
2）直线外一点Ａ与直线上任意一点连接起
来，可以画出很多条线段。
学生独立的画出几条线段，其中包括一条学生画垂线并
垂线。 互相交流
小组内研究交流：这几条线段在长度上有
什么特点？
小结：从直线外一点到这条直线所画的垂
直线段最短，它的长度叫做这点到直线的学生动手尝
距离。
试，小组内交
三、巩固练习 流。
１． ６８页４题画一画
2、６９页５题
小组内研究交
我们在测定跳远成绩时，怎样测量比较准流特点
确呢？为什么？ 全班汇报。
3、６９页６题
怎样修路最近呢？
学生独立画出
4、你能用一把直尺和一个量角器画一条直垂线，组内同
线的垂线吗？ 学互查
四、课堂小结 学生组内讨
通过学习画垂线，你有什么体会？ 论，全班交流
学生独立完
五、作业
成。
练习画垂线
学生动手画垂
线。
第三课时
课题
画平行线６７页
教
学
目
标
使学生掌握画
图的技巧。
使学生明确垂
线的重要性
质，直线外一
点到这条直线<
br>间的距离垂线
最短
通过练习，巩
固画垂线的方
法，初步培养
学生空间想象
能力。
课型 新授
知识与技能：
1、会用三角尺和直尺熟练准确的画出一组平行
线。2、会利用画垂线的方法
准确的画出长方形。
3、培养学生作图的能力。
过程与方法
通过操作活动，使学生经历画平行线的全过程，培养学生作图的能力。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
情感态度和价值观：
通过活动，让学生从中感受到学习的乐趣，体会到成功的喜悦，从而提高学
习的兴趣。
重点 巩固对平行线的认识，会用三角尺和直尺准确的画出一组平行线。
难点
准确的画出垂线和一组平行线。会利用画垂线和画平行线的方法准确的画出
长方形。
教具
直尺或三角板
教师导学 学生活动 教学意图
一、 复习导入
教
1、回忆一下，什么叫平行线？ 学生汇报 复习所学的平
学 2、我们身边哪些物体的边是互相平行
行线知识，，
过 的。 学生举生活中的为学习新知识
程
我们怎么样才能画出一组平行线呢？这实例。 作准备。
节课我们就来学习画平行线
板书课题：画平行线
二、探究新知
１．可以用直尺和三角尺画平行线。
步骤：
１）．用左手固定直尺，用右手将三角尺
的一条直角边紧贴着直尺，沿另一条直
角边画一条直线。 学生认真观察后
２）．将三角尺紧贴着直尺移动位置，再叙述画平行线的
画出一条直线，这条直线与第一步画出步骤 使学生掌握画
的直线平行。
平行线的方
可以用画平行线的方法检验两条直线是 法，培养学生
不是互相平行。
作图的能力。
２大家用自己手中的直尺和三角板自己
画一组平行线，然后小组内的同学互相学生画一组平行
检查，对方画的是否平行。
线，组内的同学
3、小组活动： 互相检查。
通过动手操
在你所画的这组平行线之间画几条与平 作，
行线垂直的线段，量一量这些线段的长
使学生理解平
度，你能发现什么？在小组内交流一下小组讨论后全班行线间的距离
全班汇报
汇报 是相等的
小结：平行线间的距离是相等的。
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
４． 小组讨论：怎样画一个长３厘米、
宽２厘米的长方形？
长方形的对边是互相平行的。
相邻的两条边是互相垂直的。
可以用垂线或平行线的方法来画。
全班汇报组内研究的画法：
先画一条长３厘米的
线段，再过两
个端点在线段的同侧分别画两条与它垂
直的２厘米长的线段，最后把两条线段的端点用线连接起来。
三、巩固新知：
1、独立画一个边长是４厘米的正方形。
2、利用所学的画平行线和垂线的方法，
自己设计一幅图画。
四、课堂小结
通过学习画平行线，你有什么体会
五、作业６８页４题
学生讨论画法
可以用垂线或平
行线的方法来
画。
说画长方形的步
骤。
使学生会利用
画垂线的方法
准确的画出长
方形。
通过练习，
能
够把学到的知识
进行及时的巩固
复习。
第四课时
课题
平行四边形和梯形
教
学
目
标
课型 新授
知识与技能： <
br>１．使学生理解平行四边形和梯形的概念及特征。2．使学生了解学过的所
有四边形之间的关系，
并会用集合图表示。
过程与方法：
通过操作活动，使学生经历认识平行四边形和梯形的全过程，掌握它们的特
征。
情感态度和价值观：
通过活动，让学生从中感受到学习的乐趣，体会到成功的喜悦，从而提高学
习的兴趣。
重点
理解平行四边形和梯形的概念及特征。了解学过的所有四边形之间的关系，
并会用集合图表示。
难点
理解平行四边形和梯形的概念及特征。用集合图表示学过的所有四边形之间
的关系，
教具
图形，剪子，七巧板
教 教师导学 学生活动 教学意图
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、创设情景 感知图形
１．出示校园图（７０页）
在我们美丽的校园中，你能找到那些四
边形？
梯子的侧面－梯形
２．画出你喜欢的一个四边形。说一说
什么样的图形是四边形？
展示学生画出的四边形，请学生标出它
们的名称。
长方形 平行四边形
教
学
过
程
黑板的表面、窗户的
表面－长方形
楼梯的栏杆、活动
门上面有平行四边形
学生画自己喜欢的四
边形
梯形 正方形
按边的特点：对边平
３．小组交流： 行的；
从四边形的特点来看，四边形可以分成只有一组对边平行，
几类？ 另一组不平行的；
学生讨论交流 对边不平行
二、探究新知 的。。。。。。
1．归纳平行四边形和梯形的概念
有什么特点的图形是平行四边形？
按角的特点：４个角
都是直角的，不是直
角的
两组对边分别平行的四边形叫做平行四
边形。
学生概括平行四边形
强调说明：只要四边形的每组对边分别的定义
平行，就能确定它的每组对边相等。因
此平行四边形的定义是两组对边分别平学会叙述定义
行的四边形。
提问：
①生活中你见过这样的图形吗？
它们的外形像什么？
②这些图形有几条边？几个角？是什么
图形？
③这几个四边形有边有什么特点？ 学生说梯形的特点
④它是平行四边形吗？
⑤你们在量这些图形时，是否发现它们
都有一个共同的特点？如果有，是什
么？
每个图中都有一组对
创设情
境，激发
学生学习
的兴趣，
为学习新
知识作准
备
通过分
类，使学
生进一步
认识所学
的四边形
使学生理
解平行四
边形和梯
形的概念
及特征。
使学生了
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
只有一组对边平行的四边形叫做梯形。
５．现在你有什么问题吗？
长方形和正方形是平行四边形吗？为什
么？
６．用集合图表示四边形之间的关系。<
br>我们学过的长方形、正方形、平行四边
形、刚刚认识的梯形，你能用这个集合
圈来表示他
们的关系吗？
７．判断：
①长方形是特殊的平行四边形。
（ ）
②两个完全一样的梯形可以拼成一个平
行四边形。（ ）
③一个梯形中只有一组对边平行。
（ ）
三、巩固练习
1、在梯形里画两条线段，把它分割成
三个三角形。你有几种画法？学生展示
2、七巧板拼一拼
① 用两块拼一个梯形
② 用三块拼一个梯形
③用一套七巧板拼一个平行四边形
边平行
图形的关系学生说
四边形
平行四边形
长方形
正方形
判断后订正
学生汇报并展示
解学过的
所有四边
形之间的
关系，并
会用集合
图表示。
梯形
提高学生
的判断能
力
学生动手拼图形
学生独立数图形后全
班订正
２．
下面的
图形中有（ ）个大小不同的梯
形。
学生动手拼图形
全班展示交流
３． 用两个完全一样的梯形，能拼成一
个平行四边形吗？
把１张梯形纸剪一次，再拼成一个平行
通过练
习，使学
生进一步
理解平行
四边形和<
br>梯形的特
征，培养
学生动手
操作和认
真思考的
能力
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
四边形。
拿一张长方行纸，不对折，剪一次，再
拼出一个梯形。
四、课堂小结
通过这节课的学习，你有何体会和收
获？
五、作业
１．把一个平
行四边形剪成两个图形，
然后拼成一个三角形，这个三角是什么
三角形？有几种剪拼的方法？
２．把一张平行四边形的纸剪一下，分
成两个梯形，有多少种剪法？
课后
小记
第五课时
课题
平行四边形和梯形７１－７２页
课型
教
学
目
标
新授
知识与技
能：1、使学生认识梯形的底和高以及底和高的意义并会画梯形的
高。知道什么叫等腰梯形以及等腰梯形
和梯形的关系。2、理解平行四边形
的特征，并会画高。3、培养学生的空间观念。
过程与方法
通过动手操作，使学生经历认识梯形的底和高的意义和画高的全过程，进一
步培养学生的空间观念。
情感态度和价值观：
使学生感受到学习的乐趣，体会到成功的喜悦，从而提高学习的兴趣。
重点
理解平行四边形的特征以及梯形底和高的意义并会画梯形的高。
难点
理解平行四边形的特征以及梯形底和高的意义并会画梯形的高。
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
教具
图形，剪子
教
学
过
程
教师导学
一、动手操作 感受新知
１．平行四边形的特性。
同学们已经学过三角形，知道三角形具
有稳定性的特性，那么平行四边形有什
么特征呢
？
(1)教师演示。
教师拿出一个用四根木条钉成的长方
形，两手捏住长方形的两
个对角，向相
反方向拉，观察两组对边有什么变化？
拉成了什么图形？为什么没有变？
(2)动手操作。
学生自己把准备长方形框拉成了平
行四边形，并动手测量一下两线对边是
否还平行。
(3)归纳。根据刚才的实验、测量，引导
学生概括出：平行四边形具有不稳定
性。
(4)对比。三角形具有稳定性，不容易变
形；平行四边形与三角形不同它容易变
形，
也就是不稳定性。
你能举出例子日常生活中应用平行四边
形容易变形这一性质的应用吗
二：探究新知
学生活动
学生观察老师
的演示
指边，
形状
变了，角变
了，边的长短
没有变
学生拉长方形
的框架并测量
学生概括平行
四边形的特性
学生举生活中
的实例
动手画平行四
边形的高，同
桌互相检查
说出梯形的各
部分名称
画梯形的高，
教学意图
通过动手操作，
使学生理解平行
四边形具有不稳
定性。
使学生感受数学
与生活的密切联
系。
使学生理解平行
四边形的特征并
会画它的高。
1．学习平行四边形的底和高。
(1)认识平行四边形的底和高。
(2)找出相对应的底和高。
(3)画平行四边形的高。
教师讲解后，学生动手画高，７２页
“做一做”第２题。７３页１题。
2．认识梯形各部分名称。
１）结合图说明，说一说梯形个部分的
名称。
提问：梯形的高是从哪一边到哪一边的
垂线？高能不能画在腰上？
７２页做一做２，７３页１题 画梯形
中试画高。
总结：梯形的高只能从互相平行的一组
对边中任意一条边上的一点，向它的对
使学生认识梯形
的底和高以及底
和高的意义并会
画梯形的高。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
画垂线。
再想一想，你怎样区分梯形
的底和腰
呢？在学生思考的基础上，再次强调：
梯形的底和腰是根据对否平行来区分
的
。
２）认识等腰梯形。
(1)小组研究：每组一个等腰梯形，研究
它的特点。
(2)小组交流汇报。
对折后两腰相等，并且重合。
用尺子测量后，也同样得到两腰相等的
特征。
(3)概括。两腰相等的梯形叫做等腰梯
形。
三、巩固练习
1、７３页２题，在点子图上画平行四边
形和梯形，分别画出它们的高。
2、７３页３题。剪一剪
在平行四边形纸上剪一刀，使剪下的两
个图形都是梯形。
在梯形纸上剪一刀，使剪下的两个图形
有一个是平行四边形。那么另一个图形
是什么形
呢？
四、课堂小结：
你对平行四边形和梯形的学习有什么收
获和体会？
五、作业：
７４－７６页４、８、１０题。
第六课时
课题
平行四边形和梯形75-76页
教
学
目
标
知识与技能：
同桌互相检
查，
学生思考后回
答
小组讨论等腰
梯形的特点
动手操作进行
验证
独立完成后展
示汇报
学生动手操作
完成
使学生知道什么
叫等腰梯形以及
等腰梯形和梯形
的关系
通过练习，巩固
画高的方法，培
养学生动手操作
和认真思考的能
力。
课型 练习
1、使学生通过实际测量充分感知四边形内角和为３６０度这一规律。2
、提
高学生综合运用知识解决问题的能力。。
过程与方法
通过动手测量，使学生经
历充分感知四边形内角和为３６０度这一规律的全
过程，并渗透归纳、猜想和验证的数学思想。
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
情感态度和价值观：
使学生感悟到数学的神奇和奥妙，增强学好数学的信心。
重点
难点
感知四边形内角和是３６０度这一规律。
感知四边形内角和是３６０度这一规律。
教具
量角器
教
学
过
程
教师导学
一、动手操作 引发探究
师：这节课我们继续来研究四边形
板书课题：平行四边形和梯形二、
探究新知
展示一个平行四边形，请学生用量
角器测量一下每个角的度数。再把四个
角的度数相加，是多少度呢？这是一个
四边形，其他的
四边形是什么情况呢？
小组研究，总结规律
１．
组内分工测量７５页８题中的每个
四边形的各个角的度数。
２． 汇总填表７５页９题。
３． 共同讨论总结规律。
４． 全班汇报交流。
出示图形
小组内可再任意画一个四边形试一试。
小结：任意一个四边形四个角的度数之
和都是３６０度。
三、巩固新知
１．在表中适当的空格内画“∨”。
２．在图中填写合适的四边形名称。
四、课堂小结：这节课有什么收获？
五、作业：76页 10---12
学生活动
学生用量角器测量
每个角的度数
小组讨论研究总结
出规律
全班交流得出
任意一个四边形四
个角的度数之和都
是３６０度。
学生画四边形试
学生独立完成后交
流汇报
教学意图
使学生通过
实际测量充
分感知四边
形内角和
为
３６０度这
一规律
渗透归纳、
想和验证猜
的数学思
想，提高学
生综合运用
知识解决问
题的能力。。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
① ②
③ ④
⑤ ⑥
⑦ ⑧
图 形 各 个 角 的 度 数 ４个角的和
①
②
③
④
⑤
⑥
⑦
⑧
。。。。。。
１．在表中适当的空格内画“∨”。
对边平行且相等 两组对角都相等
４个角的和是３６
０度
四边形
梯形
平行四边形
菱形
长方形
正方形
２．在图中填写合适的四边形名称。
① ② ③ ④
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
⑤ ⑥ ⑦
⑧
图 形 各 个 角 的 度 数 ４个角的和
①
②
③
④
⑤
⑥
⑦
⑧
。。。。。。
１．在表中适当的空格内画“∨”。
对边平行且相等 两组对角都相等
４个角的和是３６
０度
四边形
梯形
平行四边形
菱形
长方形
正方形
２．在图中填写合适的四边形名称。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
４条边都相等 ４个角都是直角
第五单元
除数是两位数的除法
第一课时
课题 课型 新授
口算除法（例1）
教
学
目
标
知识与技能：
1、使学生在理解的基础
上，掌握用整十数除商是一位数的口算方法。2、培
养学生类推迁移的能力和抽象概括的能力，
过程与方法：通过观察，引导学生发现规律，发展学生的思维。
情感、态度和价值观：
培养学生养成认真计算的良好学习习惯。
重点 掌握用整十数除商是一位数的口算方法。
难点 培养学生养成认真计算的良好学习习惯。
教具 图片
教 教师导学
学生活动 教学意图
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
学
过
程
教
学
过
程
一、准备题：
1、20、50、120、150分别是几个十？ 学生口答结果
2、口算，说说你是怎样计算的：
60÷2 80÷4 90÷3
120÷6
二、新授：
1、出示例1
80里面有4个
（1）有80个气球。每班20个。可以分20，商4
给几个班？
提问：计算这道题时怎样想？80里面有
几个20？怎样列式？
方法一：想
80÷20 如何计算？ 20×4=80，所以
小组交流讨论。小组汇报：
80÷20 =2
练一练： 方法二：
80÷48= 90÷30=
83÷20≈ 8÷2=4，所以
80÷19≈ 80÷20 =2
（2）有120面彩旗。每班30面。能提
什么问题？
可以分给几个
可以分给几个班？怎么计算？ 班？
列式： 120÷30
提问：计算这道题时怎样想？ 120÷30
120里面有几个30？
120里面有4个
几个30是120？ 30，商4
120是12个10，30是3个10，120个
10除以3个10，商4。
4个30是120，
练一练： 商4
120÷40 150÷50
160÷80 120是12个
小结：口算整十数除商是一位数的口10，30是3个
算，可从
除法意义上想得数，也可用乘10，120个10
法去想，算后要验算一下，必免出现除以3个10，<
br>120÷30=40的情况，验算时可以用乘法商4。
来验算：30×40=1200
独立完成后全班
订正
三、练习：
1、口算下面各题
4÷2
6÷3 36÷6 42÷7 学生独立完成后
40÷20 60÷30
360÷60 集体订正
420÷70 90÷30 540÷60
630÷70 180÷20 80÷40
450÷50 360÷90
810÷90
2、书后：（P80 1、2、3、4、5）
四、总结
今天你学会了什么？
五、作业：
自己相应练习一些口算题
复习口算，为
学习新知识作
准备。
使学生能运用
类推迁移的方
法，掌握用整
十
数除商是一
位数的口算方
法。
通过练习，
能
够把学到的知识
进行及时的巩固
复习。
提高学生的口
算能力
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
第二课时
课题 笔算除法（例1及相关练习） 课型 新授
教
知识与技能：：
学 2、 学生掌握除数是整十数除法方法。2、让学生学会除法竖式的书写格式。
目 过程与方法：使学生经历笔算除法计算的全过程，帮助学生理解算理。
标
情感、态度和价值观：
培养学生养成认真计算的良好学习习惯。
重点
使学生掌握除数是整十数的竖式书写格式。
难点 除数是两位数，先看被除数的前两位和商的书写位置
教具 图片、小棒
教 教师导学 学生活动 教学意图
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
学
过
程
教
学
过
程
一、复习：
1、口算：60÷20
120÷30 学生口答结果
2、在下面的（ ）里最大能填几？
40×（
）<83 60×（ ）
<508
二、探究新知
1、出示例2
今天是“阅读日”，这里有92本连
环画，140本故事书。
（1）92本连环画，每班30本，可学生汇报计算的方
以分给几个班？ 法
先口算，说说你是怎样计算的？ 92÷30≈3
引导学生，还可以用笔算的方法计学生尝试计算，借
算。 助小棒算一算
学生尝试计算，可以借助小棒算一算
计算除数是一位数的除法时，先看
被除数的前一位，现在计算除数是两小组讨论交流计算
位数的除法，应先看被除数的前两的过程
位。 1
展示直观图，结合口算引导学生：3
个30是90，商3。商写在什么位全班展示分小棒的
置？ 过程，讲解计算的
3 方法。
30 ）9 2
9 0
2
练一练
学生独立完成后，
20 ）80 30） 64 交流计算方法
40）85
学生说计算的方法
（2）出示：
30×4=120〈140
140本故事书，每班30本，可以分30×5=150〉140
给几个班？ 所以应商4。
说说你是怎样计算的？
引导学生，用笔算的方法计算。
140÷30=4„„20
4 学生尝试计算，借
30 ) 140 助小棒算一算
120
20
全班展示分小棒的
被除数的前两位不够除怎么办？ 过程，讲解计算的
借助小棒尝试算一算。
方法。
展示直观图，结合口算引导学生：4
复习旧知识，
为学习新课作
准备。
借助小棒和直
观图，帮助学
生理解算理。
学生掌握除数
是整十数除法
方法，学会除
法竖式的书写
格式。
使学生进一步
理解算法，掌
握笔算的方
法。
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
个30是120，商4。商写在什么位商写在个位上。
置？
练一练：
学生独立完成后，
20）140 50）280 汇报计算方法。
80）565
小结：除数是整十数的除法，笔算
方法是什么？ 总结计算方法
先看被除数的前两位，不够除看
前三位，除到哪一位商就写在哪
一位上面。
三、练习：
1、板演：
20）80 30）160
90）820 90）480
学生独立计算后，
2、P82 1、 2
自我检查相互检查
四、总结
今天你都学会了什么？
五、作业：书后：第82页2
第83页1、2
通过练习，巩
固计算方法，
使学生能正确
计算。
第三课时
课题 笔算除法练习 课型 练习
教 知识与技能：：
学 1、复习除数是整十数除法方法。2、让学生巩固除法竖式的书写格式。
目
过程与方法：使学生经历笔算除法计算的全过程，巩固算理和计算方法。
标 情感、态度和价值观：
培养学生养成认真计算的良好学习习惯。
重点 使学生掌握除数是整十数的竖式书写格式。
难点 除数是两位数，先看被除数的前两位和商的书写位置
教具 练习卡
教
教师导学 学生活动 教学意图
The first: to implement
e treatment, safe developmentch, protect the
safety of employees in the enterprise production,
carbon company equipment to ensure safe and
reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
学
过
程
教
学
过
程
一、 复习导入；
1、口算
80÷20
320÷80 40×70
240÷60 60×90 270÷90
4×60 210÷70 350÷50
2、脱式计算
75×4＋630 376＋280÷70
9×60－320
6400÷80－64
3、 笔算
63÷20 260÷80
笔算除法的计算方法是什么？
板书课题：笔算除法练习
二、练习内容：
1、判断并改错。
说一说找到的错处和纠正的结果、错的
原因和怎样避免。
2、笔算
310÷50 170÷30 643÷80
406÷60 285÷40
111÷20
478÷70 163÷30 294÷60
3、应用题
1）一个足球30元，用75元钱可以买几
个小足球，还剩多少钱？
2）有饲料100千克，这些猪每天要
吃30千克饲料，一袋饲料够喂几天
还剩多少千克？
3）计划生产400台电视机，每月生产70
台，半年内是否可以完成任务？
4）每节车厢限乘60吨，有500吨货
物，需要多少节车厢才能装完？
三、思考：
如○是□的20倍，下面哪些是对的。
○×20=□ □×20=○
○÷20=□ □÷20=○
○÷□=20 □÷○=20
四、总结
今天你都学会了什么？
五、作业：自主练习计算题
口答结果
计算后订正结果
指名板演
讲解计算的方
法。
找出错因并及时
改正
独立计算后全班
订正
独立分析题中给
出的信息数据和
问题，独立解决
问题
小组讨论汇报交
流。
独立思考后全班
交流
复习口算和笔
算，为练习作
准备。
在纠正错误的
活动中进一步
掌握笔算除法
的基本方法
巩固除数是整
十数除法方
法，巩固除法
竖式的书写
式。
体会除法在生
活、生产中的
价值，提高解
决问题的能
力。
提高学生的思
维能力。
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
第四课时
课题
笔算除法（例2及相关练习） 课型 新授
教 知识与技能：：
学
1、使学生学会“四舍”“五入”的试商方法，正确的计算除数是两位数的
目
除法，知道在什么情况下需要调商，初步掌握调商的方法。2、培养学生的
标
迁移能力和抽象概括能力。
过程与方法：使学生经历笔算除法试商的全过程，掌握试商的方法。
情感、态度和价值观：
培养学生养成认真计算的良好学习习惯。
重点
使学生学会用“四舍” “五入” 的试商方法，正确计算除数是两位数的除
法
难点
掌握试商的方法。
教具 图片
教 教师导学 学生活动 教学意图
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
学
过
程
一、复习：
1、（
）里最大能填几？
30×（ ）<75 40×（ ）
<180
2、在○里填上>或<
35×4 ○ 138 42×5 ○ 230
3、下面各题应该商几？
91÷20 84÷40
198÷20
215÷30
二、探究新知
1、 出示例3
（1）21本《作文选》要付84元。
一本《作文选》多少元？
问：怎样列式？和昨天学习的除法
题有什么不同？如何计算？
提问：你能计算出84÷21等于多
少吗？是怎样想的？学生讨论
教师归纳：
如果把除数看作和它接近的整
十数来试商，就比较方便了。
21最接近20，把21看作20来试
商，
这样把84÷21转化成84÷20，应
该商几？商写在哪一位上？
试商4。因为除数21，不是
20，因此，商是否合适，还
要看商与除数相乘的情况，
可以在商的个位上先轻轻地
写上“4”然后把4与21相<
br>乘，看结果是否等于或小于
84。因为21×4正好等于
84，说明商4合适，这时将<
br>4写清楚。
反馈练习 64÷21 68÷34 92÷23
引导学生观察三道题的除数的个位
数。
学生独立完成后全
班汇报
学生列式
除数不是整十数
学生尝试计算，讨
论汇报计算方法
学生叙说试商过
程，讲解计算的过
程
指名板演，讲述计
算的全过程
通过复习与新课有
直接联系的旧知
识，为本节课学习
除数是任意两位数
除法的试商方法在
计算和思路上做好准备。
使学生体会用“四
舍”“五入”试商
的方法，掌握除数
是两位数的除法的
计算方法。
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
教
学
过
程
提问：这三道题的除数的个位数分
别是几？你把它们看做多
少来试
商？你是怎样计算的？
归纳小结：当除数的个位是1、2、
3、4时，把除数
的个位数舍去，看
作整十数来试商，试得的商和除数
相乘，如果余数比除数小，说明试
得的商是合适的。
（2）王老师还有196元，要买39
元一本的词典，可以买多少本？还<
br>剩多少元？怎样列式？怎样想的？
196÷39=
5
39） 196
195
1
归纳：如果把除数看作和它接近的
整十数来试商，就比较方便了。
39最接近40，
把39看作40来试
商，这样把196÷39转化成
196÷40，应该商几？商写
在
哪一位上？试商4。因为
除数39，不是40，因此，
商是否合适，还要看商与除
数相
乘的情况，可以在商的
个位上先轻轻地写上
“4”，不行再调商为5。
学生试做：
练习：
198÷23 215÷34 552÷63
提问：你
把各题的除数看作多少来
试商？你怎么计算的？这三道题的
调商过程有什么共同点？
小结：用“四舍”或“五入”的方
法，把除数看作整十数来试商，初
商容易大，大了要调小（小
了要调
大）。
三、巩固练习：
1、板演
46÷23 153÷51
300÷74
293÷31 294÷42 200÷63
2、练习 书后2、3
四、总结
1、这节课你学习了什么新知识？
观察后汇报计算过
程
总结试商方法
读题分析后列式计
算
学生叙说试商过
程，讲解计算的过
程
学生板演，说方
法。
找出共同特点
独立计算后互相检
查，讲方法
展示试商的全过
程，知
道在什么情
况下需要调商，进
一步掌握调商的方
法。
培养学生的迁移能
力和抽象概括能
力。
通过练习，巩固试
商方法，掌握计算
方法，提高计算能
力。
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
2、当除数的个数是1、2、3、4时
怎样试商？
五、作业：P86
4、5、6
四、总结
今天你都学会了什么？
五、作业：自主练习计算题
第五课时
课题
笔算除法（例3） 课型 新授
教
知识与技能：1、让学生学会把除数看作是15、25的特殊数进行试商的方
学
法。2、掌握灵活试商的技巧，提高试商速度。
目
过程与方法：使学生经历笔算除法试商的全过程，能灵活地试商。
标 情感、态度和价值观：
培养学生养成认真计算的良好学习习惯。
重点
掌握把除数看作是15、25的特殊数进行试商的方法。
难点 采用灵活试商的方法进行试商计算。
教具 图片
教 教师导学 学生活动 教学意图
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、复习导入 口答结果
1、15×2= 15×3= 25×4=
15×4= 15×5= 25×8= 指名板演，其他同
2、笔算：
学在练习本上做。
326÷81 294÷58 721÷83 讲方法
讲述试商的方法和计算的过程
3、这节课继续学习笔算除法
板书课题：笔算除法
二、探究新知
读题分析，列式
1、 出示例4 ：
学校礼堂每排有26个座位，四年级共
有140人，可以坐满几排？还剩几人？ 尝试计算
读题，理解题意，怎么列式，如何计
算？
140÷26=5„„10 用五入的方法，把
5 26看作30，商余36
26）140
36里面还有一个26
130
商小了，改商5。需
10 要调一次商
（1）学生试做，汇报作法。
商和除数相乘再加
（2）可以用五入的方法，把26看作余数。
30，算的对吗？帮助检查一下？
如何验算有余数的除法？
可以把26看作25
问：还可以怎么试商？ 去试商
（3）可以把26看作25，用口算试
商，5个25是125，接近140，所以商独立完成后，说出
5。 试商方法
（4）把24、25、26都看作25来试
商。
2、练习：
把24、25、26都看作25试商
225÷25 114÷24
208÷26
135÷15 128÷16 114÷
复习口算和
笔算，为学
习新知识作
准备。
使学生掌握
把除数看作
是15、25的
特殊数进行
试商的方法
体会在试商
的过程中，
应根据不同
情况灵活运
用试商方法
让学生体会
利用口算试
商的优越性
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
教
学
过
程
三、巩固练习
1、在（ ）里最大能填几？
15×( )< 65 25×(
)<124 独立完成集体订正
25×( )< 95 15×( )<124
26×( )<150 16×( )<100
2、计算：
计算后说出计算方
405÷15 192÷24 728÷26 法
496÷14
四、总结
在做计算的时候，可以将14、15、16
和24、25、26看作15、25来进行
试商，提高试商速度。
五、作业：86页2、3、4
通过练习，
掌握灵活试
商的技巧，
提高试商速
度。
第六课时
课题 笔算除法（例4） 课型 新授
教 知识与技能：
学
1、学习商是两位数的除法，总结除数是两位数的除法计算方法。2、巩固除
目 法的估算及验算方法。
标 过程与方法：使学生经历笔算除法计算的全过程，掌握两位数除法的笔算方
法。
情感、态度和价值观：
培养学生养成认真计算的良好学习习惯。
重点 商的位置。
难点 除数是两位数的除法计算法则
教具 图片
教 教师导学 学生活动
教学意图
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、 复习：
商是几位数？为什么？
4）948 4）348
二、新授：
1、出示例5：
（1）学校共有576名学生，每18人组
成一个环保小组，可以组成多少组？
问：怎样列式？
除数是两位数，先看被除数的前几位试
商？
57比18大，18除57个十，商几个
十？“3”应写在哪一位的上面？
第一次商后余3比18小，说明商3
合适。余3是3个十，下步该怎么办？
问：这道题的商是几位数？商是多少？
观察每次商后的余数，你发现了什么？
576÷18=32
32
18）576
54
36
36
0
练一练：
805÷23 826÷59
1487÷47
总结：怎样计算除数是两位数的除法
从被除数的高位数起，先看被除数的前
两位；如果前两位比除数小，就要看前
三位；除到被除数的哪一
位，商就写在那一位的上面；余下的数
必须比除数小。
（2）十月是学校环保月，共收集了930
节废电池，平均每天收集废电池多少
节？
问：怎样列式？如何验算？
2、比较一位数除法与两位数除法有什
么相同的地方？有什么不同的地方？
3、练习，先估算商大约是多少，再计
算。 2293÷34 9588÷28
独立完成订正
教
学
过
程
学生独立完成，
说出计算的方法
读题列式
576÷18
先看被除数的前
两位试商？
把6落下来后，
用18除36商
几？“2”应写
在哪一位的上面？没有余数。
说明商2合适。
学生观察后汇
报：
每次商后的余数
一定要比除数
小。
学生总结除数是
两位数的除法的
计算方法
学生独立试做：
930÷31
相同点都是从最
高位除起，除到
被
除数的哪一位
就在那一位上面
写商。每次除后
的余数必须比除
数小。
复习笔算方
法，为学习新
知识作准备。
使学生弄清楚
每一位商的书
写位置，及其
道理，主动探
索计算方法
使学生掌握除
数是两位数的
除法的计算方
法
使学生知道一
位数除法与两
位数除法的相
同点和不同点
使学生掌握除
The first: to
implement e treatment, safe developmentch, protect
the safety of employees in the enterprise
production, carbon company equipment to ensure
safe and reliable operation, these provisions are
formulated. Article II: according to the
provisions of the People's Republic of China
production safety law and other relevant laws and
regulations of the State, to limit the carbon
system of work safety requirements and management
of the company. Article III: the company adopted
the administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
4总结
除法的计算法则是什么？
三、巩固新知：
1、练习十九1根据试商的情况，很快找
出准确的商
2、
直接说出下面各题该商几？
60÷15 175÷25 288÷24
234÷26 384÷16 775÷25
3、 笔算第91页6
四、小结：这节课学习了什么？有什么
收获？
五、作业：P92 9、10
板书
设计
不同点：除数是
一位数时，先用
除数试除被除
数
的前一位，如果
它比除数小，再
试除前两位，除
数是两位数，先
用
除数试除被除
数的前两位，如
果它比除数小，
再试除被除数前
三位。
学生总结
独立完成后订正
笔算除法
数是两位数的
除法的计算方
法
通过练习，巩
固计算方法，
提高计算的能
力。
例5：
学校共有576名学生，每18人组成一个
十月是学校环保月，共收集了930节
废电池，
环保小组，可以组成多少组？
平均每天收集废电池多少节？
576÷18=32
32
18）576
54
36
36
0
除法的法则：从被除
数的高位数起，先看被除数的前两位；如果前两位比除数小，
就要看前三位；除到被除数的哪一位，商就
写在那一位的上面；余下的数必须比除
数小。
第七课时
课题 笔算除法练习 课型 练习
教
知识与技能：
学 1、巩固除法法则、估算及验算方法。2、培养学生的计算能力。
目
标 过程与方法：使学生经历笔算除法计算的过程，巩固两位数除法的笔算方
法。
情感、态度和价值观：
培养学生养成认真计算和认真检查的良好学习习惯。
重点
商的位置。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
难点 除数是两位数的除法计算法则
教具
教
学
过
程
图片、口算卡片
教师导学
一、复习导入：
1、口算卡片（略）
2、填空：
1）把320平均分成40份，，每份是（ ）
2）每份是70，490里面有（ ）个70
3）（ ）÷（
）=20„„19，除数最小是
（ ）
4）322÷40的商写在（ ）位上。
5）475与195的差里有（ ）个70。
6）如果4×30+6=126，那么126÷30=
（ ）„„（ ）
7）有163个鸡蛋，每30个装一箱，这些
鸡蛋需要（ ）个箱子。
3、说说怎样计算除数是两位数的除法？
二、练习内容
1、计算
346÷42 171÷57 1674÷93
876÷73
2001÷87 10332÷84
2、计算并验算
4814÷83
8445÷33 3243÷47
1827÷63 1568÷28 2669÷36
3、按要求在（）里填上一位适当的数字，
再计算。
商是一位数
商是两位数
（ ）25÷38 （ ）76÷27
（ ）96÷82 （
）04÷64
4、 解决问题；
1）一个排球42元，300元最多可以买几
个排球？
学生活动
学生口答结果
指名回答，全
班订正
学生说两位数
除法的计算法
则
独立完成，同
位互相检查计
算过程。
独立完成，汇
报计算结果。
学生填写数字
在计算
独立分析解决
问题。
教学意图
复习除法有关
知识，为下面
练习做准备
通过练习，进
一步巩固计算
法则，掌握灵
活试商的技
巧，提高计算<
br>的能力
提高学生提出
和解决数学问
题的能力，培
养学生应用数
学的意识。
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
教
学
过
程
2）一部电话机94元，一部扫描机
846元，扫描机的单价是电话机的几独立完成集体订正
倍？
3）探究题
小英做一道除法题时，把除数48看
成84，结果得到的商是37余12，求讨论后交流汇报
正确的商是多少？
4）竞赛题：
独立完成后汇报
三、总结
通过这几节课的学习，你学会计算
除数是两位数的除法了吗？说说怎样<
br>计算除数是两位数的除法？
四、作业：91页5----8
加强思维训
练，提高学
生的思维能
力。
第八课时
教
学
过
程
三、介绍试商方法：同头无除商学生说试商的方
“9”“8” 法。
1、出示例题： 4214÷43=98
98
43）4214 仔细观察，发现特
387 点，总结试商技巧
344
344
0
2、介绍方法：被除数的头是4，除
数的也是4，商不是9，则是8。 尝试练习
3、练习：4455÷45 2136÷24 独立完成后，汇报
四、巩固练习
试商过程
2408÷43 3312÷36
1938÷38
3080÷35
五、总结 独立完成，说出试
在掌握基本试商方法的基础上，商方法
掌握这些灵活试商的方法。
六、作业：
自己自主练习几题体会试商方法
使学生掌握
试商的技
巧，提高学
生计算的能
力。
通过练习，
巩固试商方
法。
第九课时
课题 商的变化规律 课型 新授
教
知识与技能：1、学生通过观察，能够发现并总结商的变化规律。2、会灵活
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
目
标
运用商的变化规律。3、培养学生用数学语言表达数学结论的能力
过程与方法：使学生经历引导学生思考发现商的变化规律的过程，灵活运用
商的变化规律。
情感、态度和价值观：
培养学生初步的抽象、概括能力及善于观察、勤于思考、勇于探索的良好习
惯。
重点
引导学生自己发现并总结商的变化规律。
难点 引导学生自己发现并总结商的变化规律。
教具
教
学
过
程
图片
教师导学
一、故事导入
安排老猴子分桃子的故事
1、8个桃子分2天吃
完，16个桃子分4
天吃完，32个桃子分8天吃完，64个桃
子分16天吃完。（将数字板书
在黑板
上）
2、提问：老猴子运用了什么知识教育
了小猴子？今天我们一起来研究一下。
二、探究新知
1、提问：观察数字，你发现了什么？
你怎么知道的？
学生说方法，教师板书。
8 ÷ 2 = 4
16 ÷ 4 = 4
32 ÷ 8 = 4
64 ÷ 16= 4
2、我们分别用第2、3、4式与第1个算
式进行比较，你发现了什么？
被除数、除数分别都乘以一个相同的数。
（扩大）
3、教师带领学生分别比较。
4、提问：谁能给我们总结一下，你发现
了什么？
5、学生讨论，并发现：
在除法里，被除数、除数同时扩大相同
的倍数，商不变。（教师板书）
6、提问：为什么说是“同时”，“相
同”？可以举例子来证明
7、我们分别用第1、2、3式与第4个算
式进行比较，你又发现了什么？
学生活动
学生听故事
学生思考发表见
解
观察数字
发现每天吃的桃
子的个数是一样
的。
用除法来进行计
算。
学生说方法，
回答：商都是4
被除数、除数分
别都乘以一个相
同的数。
学生在小组内讨
论
学生举例说明
回答：被除数、
除数分别都除以
一个相同的数。
思考后汇报
教学意图
创设情境，激
发兴趣，为学
习新知识做准
备。
使学生通过观
察，思考，能
够发现并总结
商的变化规律
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
教
学
过
程
被除数、除数分别都除以一个相同的数。
（缩小）
8、通过观察，谁能再给我们总结一下，
你发现了什么？
在除法里，被除数、除数同时扩大（或
缩小）相同的倍数，商不变。
板书课题：商的变化规律
三、总结：
1、 提问：通过观察，我们发现了除法里
有商的变化规律，那么谁能说
说你觉
得这个规律需要我们注意的有哪些？
2、 你们看我这样写对吗？为什么？
48÷12=（48×0）÷（12×0）
让学生判断。
四、巩固练习
1、书P94 1 （填空）
2、书P94 2 （填空）
3、书P94 3、4
五、总结
在运用商的变化规律时，一定要注意什
么？（“同时”，“相同”。）
六、作业：第95页5、6、思考题
讨论后总结商的变
化规律
说出注意的地方
学生判断。解答疑
问。
弄清表的结构，独
立解决问题。
独立填写各题的
商，再交流自己的
想法。
培养学生用
数学语言表
达数学结论
的能力
通过练习，
进一步熟悉
商不变
的规
律，了解商
不变的规律
的应用价
值。
第十课时
课题 整理和复习 课型 复习
教
知识与技能：1、通过整理和复习，提升学生对本单元所学知识的掌握水平
学
2、培养学生总结、归纳的能力，提高学生的学习能力
目
过程与方法：使学生经历整理和复习本单元知识的全过程，牢固掌握知识点
标 情感、态度和价值观：
使学生感受数学在生活中的应用价值，增强应用意识。
重点
除数是两位数除法的试商方法，商不变的性质。
难点 能够正确的笔算除数是两位数的除法。
教具 题卡
教 教师导学 学生活动 教学意图
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、 复习整理：
1、本节课对“两位数的除法”这一单元
进行整理和复习。
板书课题：整理和复习
2、打开数学书看第五单元的内容，看看
本单元都学习了哪些内容？
哪个小组愿意汇报你们组的交流情况？
老师指导并归纳，总结在黑板上。
问：你认为本单元哪些内容比较难？你
最容易出错？
二、复习知识点
1、
复习除法口算
1）直接说结果。
720÷80= 480÷60= 360÷90=
240÷30= 420÷70= 900÷30=
180÷20=
560÷80= 250÷50=
450÷90= 630÷70= 4000÷80=
说一说口算的方法是什么？
小结：口算整十数除商是一位数的口
算，可从除法意义上
想得数，也可用乘
法去想，算后要验算一下，验算时可以
用乘法来验算
2）估算
368÷60≈422÷80≈720÷89≈
722÷90≈ 350÷68≈
455÷70≈
578÷60≈ 507÷80≈289÷50≈
说一说估算的方法是什么？
小结：两位数除法的估算，一般是把两
位数看作与它比较
接近的整十数，再口
算出结果。
3）直接写出得数
26÷2= 55÷5=
280÷40=
85÷5= 640÷80= 81÷3=
360÷90=
96÷4= 78÷6=
根据什么算出结果的？
小结：商的变化规律
在除法里，被除数、除数同时扩大（或
缩小）相同的倍数，商不变。
2、复习笔算
1）816÷51= 665÷25= 816÷51=
1826÷83=
3672÷18= 1584÷48=
4325÷48=3276÷84=
组织学生笔算，说一说试商的方法和笔
学生看书，小组
合作进行归纳
学生思考，汇报
发言
口答结果，说口
算的方法
口答结果，说估
算的方法
学观察，根据被
除数（除数）的
变化，确定除数
（被除数）怎样
变化
，商不变。
整理归纳所学
知识，构建知
识结构，掌握
和理解知识间
的联系。
通过练习，巩
固口算和估算
的方法
使学生能运用
商不变的规律
确定商。
巩固商不变的
规律。
教
学
过
程
使学生掌握试
商方法和计算
方法，能正确
The
first: to implement e treatment, safe
developmentch, protect the safety of employees in
the enterprise production, carbon company
equipment to ensure safe and reliable operation,
these provisions are formulated. Article II:
according to the provisions of the People's
Republic of China production safety law and other
relevant laws and regulations of the State, to
limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
算的方法是什么？
从被除数的高位数起，先看被除数的前
两位；如果前两位比除数小
，就要
看前三位；除到被除数的哪一位，
商就写在那一位的上面；余下的数
必须比除数
小。
2）灵活试商法
同商比较 折半估商“5”
同头无除商“9”“8”
三、练习
1、整理和复习（第96页）
出示图表，问：解决上面的问题，你用
了什么计算方法？
2、
接着往下算。为什么可以这样计算？
3、 完成练习十八的2、3、4
四、小结：
这节课你有什么收获？
五、作业：第97---98页1、5、6
先独立笔算，然
后在全班说一说
计算的结果和笔
算的方法
说试商方法
互相说一说题
意，独立填写表
格，展示解决问
题的方法和结
果。
完成竖式计算。
独立完成全班订
正
地计算
体验运用数学
知识解决问题
的乐趣，增强
学好数学的信
心。
第六单元 统计
第一课时
课题
纵向复式条形统计图 课型 新授
教 知识与技能：
学
1、经历简单的收集、整理、描述和分析数据的过程。2、使学生初步了解数
目
据的收集和整理过程，学会整理简单的数据，会看简单的统计表和统计图，
标
会根据统计图表中的数据回答一些简单的问题。
2、过程与方法
使学生体验解数据的收集、整理、描述和分析的过程，能发现信息并进行简
单的数据分析。
3、情感态度和价值观：
体会到数学知识与实际生活紧密联系，激发学生的学习兴趣，培养学
生细心
观察的良好学习品质。
重点 绘制纵向复式条形统计图
难点
根据统计图发现问题、提出问题、解决问题
教具 课件
教师导学 学生活动 教学意图
一、 情境导入：
教 你们知道全球有多少人？中国有多少人吗？那
创设情境，
学 你们知道自己所在的区有多少人吗？ 学生观察统激发学生的
过
下面我们一起对收集到的信息进行整理和分计表 学习兴趣。
程 析。
完成两个单使学生认识
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
二、探究新知：
1、根据统计表，分别完成两个单式条形统计
图
2、根据两个条形统计图
你能发现哪些信息？
如果要在一个统计图中描述这些信息怎么办？
在学习复式统计表时是怎么把
两个单式统计表
合
式条形统计
图的绘制。
学生思考老
师的问题，
自主探究完
成复式条形
统计图的绘
制
并的？
3、展示学生绘制的纵向复式条形统计图
学生展示统
板书课题：纵向复式条形统计图 计图。
4、讨论交流：
复式条形统计图与单式条形统计图有什么区学生讨论交
别？ 流汇报
5、全班汇报交流。
分析：
独立完成后
全班交流
完成统计图
三、巩固新知 并回答问
1、 完成102页的做一做
题，全班交
流汇报
学生独立完
2、完成练习十九的第1题和第2题 成统计图并
四、课堂小结
回答下面的
这节课你有什么收获？ 问题
五、作业：第103—104页3、4、5
复式条形统
计图，体验
数据的收集
和整理过
程。
从更高的角
度认识
纵向复式条
形统计图，
体会新旧知
识的
联系与
区别，使学
生在观念和
知识上达到
提升。
发挥学
生的
观察力和想
象力，使学
生感受到我
国人民的生
活水平在不
断提高。
培养学生的
实践能力和
参与意
识，，进一
步体会数学<
br>与生活的密
切联系。
第二课时
课题
横向复式条形统计图 课型 新授
教 知识与技能：
学
1、使学生认识横向复式条形统计图，会绘制横向复式条形统计图。2、会根
目
据统计图表中的数据回答一些简单的问题。
标 2、过程与方法
使学生体会统计在现实生活中的作用在生活中找到复式统计图，并能进行简
单的数据分析。
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
3、情感态度和价值观：
体会到数学知识与实际生活紧密联系，激发学生的学习兴趣，培养学
生细心
观察的良好学习品质。
重点 绘制横向复式条形统计图
难点
根据统计图发现问题、提出问题、解决问题
教具 课件
教师导学 学生活动 教学意图
一、 情境导入：
教 现在人们的生活水平提高了，许多家庭
创设情境，激
学 都买了汽车。哪些同学的家里买了汽学生积极发言 发学生的学习
过
车？我们在外出时有时就要将汽车放在学生观察统计表 兴趣。
程 停车场。
下面我们一起对收集到的信息进行整理自主探究完成复式使学生认识横
和分析。 条形统计图的绘制
向复式条形统
二、探究新知： 学生展示统计图。 计图，会绘制
1、学习例2
横向复式条形
师：复式条形统计图还可以画成横式统计图。
的。
2学生独立完成横向复式条形统计图的
绘制
学生先独立思考，培养学生的实
再进行全班交流发践能力和参与
现信息，提出和解意识，，进一
3、通过分析你能发现什么？ 决问题
步体会数学与
学生讨论交流 生活的密切联
在整个社会所有的系。
三、巩固新知
车辆中，轿车的数使学生能根据
1、 完成106页做一做 量是最多的。 统计图表中的
2、完成练习二十的第1题、第2题和独立完成后全班交数据回答一些
第3题 流 简单的问题。
过练习，使学
四、课堂小结
完成统计图并回答生进一步体会
这节课你有什么收获？
问题，全班交流汇统计的意义和
五、作业：第103—104页3、4、5 报 作用。
学生独立完成统计
图并回答下面的问
题
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
第三课时
课题
你寄过贺卡吗？ 课型 实践课
教 知识与技能：
学
1、通过实践活动，使学生能运用所学的知识提出解决问题的方案。2、培养
目
学生发现问题、分析问题和解决问题的能力。
标 过程与方法
使学生经历发现问题、分析问
题和解决问题的全过程，根据阅读材料内容和
调查结果分析数据，提出解决问题的方案。
情感态度和价值观：
1、使学生体验统计在生活中的应用，感受数学在生活中的价值。2、培
养学
生对数学问题的敏锐眼光，增强学生环保意识，激发学生热爱大自然的
情感。
重点 用所学的知识提出解决问题的方案
难点
培养学生发现问题、分析问题和解决问题的能力。
教具 贺卡
教师导学 学生活动
教学意图
一、 情境导入：
教 1、出示贺卡，大家知道是什么吗？ 贺卡
创设情境，
学 同学们在元旦的时候都收到过贺卡吗？你学生自由发言 激发学生的
过
给谁寄过贺卡吗？ 学习兴趣。
程 2、今天我们来上一节：你寄过贺卡吗？的
实践课（板书课题）
二、探究新知
1、 发现问题； 学生阅读材料
1）呈现教材提供的阅读材料，学生阅读
平时寄贺卡的行为消耗掉了大量的木材 汇报内容
对废品要有效回收
使学生体验
2）昨天老师布置了小组调查：本小组成员
统计在生活
及家庭在去年收到的贺卡数量。 中的应用，
学生制成统计表，填写统计表。
小组汇报，交流感受数学在
2、分析问题： 调查的结果。
生活中的价
1）出示问题：1）估算一下，全校所有的
值。培养学
学生共收到多少张贺卡？所有的家庭收到 生发现问
的贺卡相当于砍掉多少课大树？
题、分析问
2）引导思考：怎样根据小组的统计结果，根据组里统计的题和解决问
估计全班、全
年级和全校共收到多少张贺结果计算出全班题的能力。
卡？ 的结果，扩展到
出示阅读资料（1）小组合作探索 全年级和全校情
况
3）引发学生对统计数据的思考，引出结论 为保护森林，应
4）问题：除了保护森林，少寄贺卡还有哪该少寄贺卡。
些好处？提出更多的问题，和同学一起讨节约日常开支，增强学生的
论解决。
减少邮政压力实践能力和
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
2、 解决问题
实施解决方案——行动起来吧！
全班讨论解决问题的方案
你有什么好的建议，和同学交流一下。
三、课堂小结
四、作业：根据今天所学的内容写一篇数
学日记
等。
汇报交流
：做环
保贺卡，打电话
发电子邮件问
候，宣传节约用
纸，计划自己平
日节约用纸的方
案等
环保意识，
激发学生热
爱大自然的
情感
第七单元 数学广角
第一课时
课题
数学广角 课型 新授
教
知识与技能：1、使学生通过简单的实例，初步体会运筹思想在解决实际问
学
题中的应用。2、使学生认识到解决问题策略的多样性，形成寻找解决问题
目 最优方案的意识。
标 过程与方法：使学生理解优化的思想，形成从多种方案中寻找最优方案的意
识，提高学生解
决问题的能力。
情感、态度和价值观：
使学生感受到数学在日常生活中的广泛应用，尝试用数学的方法解决生活中
的简单问题。
重点
体会优化的思想
难点 寻找解决问题最优方案，提高学生解决问题的能力。
教具 图片
教 教师导学 学生活动 教学意图
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、情境导入：
1、同学们喜欢吃烙饼吗？谁烙过饼，或
看家长烙过？能给大家说说烙烙饼的过
程吗？
2、烙烙饼中也有数学知识，这节课我们
就到数学广角中去学习有关烙烙饼的知
识。
板书课题：数学广角
二、探究新知
1、教学例1
1）出示情境图片：妈
妈正在烙饼，每次
只能烙两张饼，每面都要烙，每面3分
钟。小女孩说：爸爸、妈妈和我每人一
张，问：怎样才能尽快吃上饼？
先独立思考，再小组讨论交流，说说自
己是怎么安排
的？自己的方案一共需要
多长时间烙完？
问：烙一张饼需要几分钟？烙两张呢？
一共要烙3张饼，怎样烙花费的时间最
少？
问：还可以怎样烙？哪种方法比较合
理？
启发引导：在用第二种方法烙第3张饼的时候，本来一次可以烙两张饼的锅现
在只烙了一张，这里可能就浪费了时
间。想一想，会
不会还有更好的方法
呢？启发学生发现：如果锅里每次都烙
两张饼，就不会浪
学生自由汇报
观察理解情境图
的内容
找出题中的信息
总共要烙3张
饼。
学生讨论汇报：
可以一张一张的
烙；
烙一张饼要6分
钟，烙3张饼要
18分钟。
可以先烙两张，
再烙一张，这样
只用12分钟，
节省6分钟。
先烙
1、2号饼
的正面，接着烙
1号饼的反面和
3号饼的正面，
最后烙2、3号<
br>饼的的反面，有
9分钟。
创设情境，激
发学生的学习
兴趣，为学习
新知做准备。
。
使学生认识到
解决问题策略
的多样性，形
成寻找解决问
题最优方案的
意识。
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案
费时间了，问：一张饼正反面分别要烙3
分钟，怎样安排才能每次都是烙的两张
饼呢？
学生动手用硬币、课本来代表饼进行实
验。
问：如果要烙的是4张饼，5张饼„„10
张饼呢？
怎样按排最节省时间？小组讨论交流，
说说自己的发现。
2、教学例2
出示家里客人要沏查茶的情境图。
小明，帮妈妈浇壶水，给李阿姨沏杯
茶，怎样才能
尽快让客人喝上茶？观察
理解情境图。
如果你是小明，你怎样安排？需要多长
时间？和同学讨论一下，看看
谁的方案比较合理。
分小组设计方案，思考讨论：这些工序
中哪些事情要先做？哪些事情可以同时
做？
比较：谁的方案所需的时间最少？谁的
方案最合理？
三、巩固新知
1、书后做一做第1题
假设两个厨师做每个菜的时间都相等，
应该按怎样的顺序炒菜？
2、书后做一做第2题
小红应如何合理安排以上事情？
四、小结：这节课你有什么收获？
五、作业：做一做的第3题
动手实验，并记
录。
讨论交流，说自
己的发现
观察图，讨论设
计方案
用过程图表示出
自己的方案。
学生选出最佳方
案。
学生独立完成后
说说自己的理
由。
独立完成，全班
订正。
使学生感受到
数学在日常生
活中的广泛应
用，尝试用数
学
的方法解决
生活中的简单
问题。
通过练习，巩
固所学的知
识，教育学生
养成合理安排<
br>时间的良好习
惯。
第二课时
课题 数学广角 课型
新授
教 知识与技能：1、使学生初步体会运筹思想在解决实际问题中的应用。2、使
学
学生认识到解决问题策略的多样性，形成寻找解决问题最优方案的意识。
目
过程与方法：使学生理解优化的思想，形成从多种方案中寻找最优方案的意
标
识，提高学生解决问题的能力。
情感、态度和价值观：
使学生感受到数学在日常生活中的广泛应用，尝试用数学的方法解决生活中
的简单问题。
重点
体会优化的思想
难点 寻找解决问题最优方案，提高学生解决问题的能力。
of responsibility system for production
safety; (B) the organizations implement the
relevant safety instructions, important documents,
coordinate and solve the problems in the sector in
the follow-up; (C) to understand the safety,
supervision, inspection, safety, regularly receive
reports safety supervision departments. Chaired a
security analysis of monthly meetings, timely
research to solve major problems arising in the
work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
教具
教
学
过
程
图片
教师导学
一、情境导入：
1、同学们想一想，生活中有哪些事
情可以通过合理安排来提高效率？
2、这节课我们继续来学习数学广角
板书课题：数学广角
二、探究新知
教学例3
1）出示情境图片：
码头上现在同时有3艘货船需要
卸货，但是
只能一条一条地卸货，并
且每艘船卸货所需的时间各不相同，
那么按照怎样的顺序卸货能使3艘
货
船等候的总时间最少呢？
2）观察图，说说可以得到哪些信
息？
问：要使三艘货船的等候时间的总和
最少，应该按怎样的顺序卸货？
学生讨论
3）可以有哪些卸货的顺序？每种方
案总的等候时间是多少？
列出表格，问：从表中你有什么发现
吗？
引导学生思考汇报
4）找出最优方案
三、巩固新知：
1、书后做一做
小名、小亮、小叶同
时来到学校医务
室。要使三人的等候时间的总和最
少，应该怎样安排他们的就诊顺序？
学生活动
学生自由汇报
观察情境图，找出
题中的信息
学生分小组讨论
学生汇报方案，算
出每种方案等候的
时间
如果先卸船1的
货，那么
3艘船都
要等候8小时；而
如果先卸船3的
货，那么每艘船只
等候1小时。依
次
从等候时间较少的
船开始卸货，就能
使总的等候时间最
少。
学生完成设计，小
组交流，在班上交
流。
教学意图
使学生体会优
化思想在生活
中应用，培养
学生合理安排
时间的良好习
惯。
使学生认识到
解决问题策略
的多样性，形
成寻找解决问
题最优方案的
意识。
15
The first: to implement e
treatment, safe developmentch, protect the safety
of employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案 2、有210人选举大队长，有三位候
选人甲、乙、丙，每人只能选之中1
人，不能弃权。
前190张票中甲得
75张，乙得65张，丙得50张，规
定谁的票最多谁当选。若甲要当选，
最少还需要多少张票？
四、小结：
这节课你有什么收获？
五、作业：
补充练习
独立完成后，小组
交流结果
通过练习，巩
固所学的知
识，使学生感
受到
数学在日
常生活中的广
泛应用，尝试
用数学的方法
解决生活中的
简单
问题。
第三课时
课题 数学广角 课型 新授
教
知识与技能：1、使学生初步体会对策论方法在解决实际问题中的应用。2使
学
学生认识到解决问题策略的多样性，形成寻找解决问题最优方案的意识。
目
3、培养学生的应用意识和解决实际问题的能力。
标 过程与方法：使学生理解优化的思想，形成从多
种方案中寻找最优方案的意
识，提高学生解决问题的能力。
情感、态度和价值观：
使学生感受到数学在日常生活中的广泛应用，尝试用数学的方法解决生活中
的简单问题。
重点
体会优化的思想
难点 寻找解决问题最优方案，提高学生解决问题的能力。
教具 图片
教 教师导学 学生活动 教学意图
of
responsibility system for production safety; (B)
the organizations implement the relevant safety
instructions, important documents, coordinate and
solve the problems in the sector in the follow-up;
(C) to understand the safety, supervision,
inspection, safety, regularly receive reports
safety supervision departments. Chaired a security
analysis of monthly meetings, timely research to
solve major problems arising in the work of
production safety; (D) ensure safety oversight
agencies and their staff to meet the requirements
to support safety supervision departments to
perform their duties; (E) ensure accident
prevention measures and safety requirements for
technical protection measures and use; the cost of
ensuring safety award and use; (F) set the unit's
production emergencies emergency plans, and, after
emergency relief, rescue and recovery work; (VII)
faithfully and promptly report accidents to the
relevant authorities; (VIII) other specific duties
in the relevant safety regulations. 14th:
Chief Deputy is in charge of the work of the
enterprises within the scope of the security
responsibility, within the scope of the
responsibilities of leadership responsibility for
work safety, its accountability to the Chief.
15th: units and positions should have clear
security responsibilities, burden-sharing and a
subordinate to a superior safety level of
accountability. 16th: the company implements the
safe production responsibility system, including
responsibility for any grass-roots. Fourth quarter
safety supervision article 17th: company set up a
safety monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、情境导入：
1、你们听过“田忌赛马“的故事吗？
田忌是怎样赢了齐王的？谁能
给大家讲
一讲这个故事？
2、问：田忌的马都不如齐王的马，但
他却赢了？这是为什么呢？
3、这节课我们就来研究研究。
板书课题：数学广角
二、探究新知
1、把田忌在赛马中使用的方法在给出
的表格中补充完整。出示表格
齐王
田忌
本场胜
哲
第一
场
第二
场
第三
场
上等
马
中等
马
下等
马
下等
马
上等
马
中等
马
齐王
田忌
田忌
2、思考：田忌所用的这种策略是不是
唯一能赢秦王的方法？讨论
3、引导学生：看
一看田忌一共有多少
种可采用的应对策略？把田忌所有的可
以采用的策略都找出来，填如表中。
4、展示各组汇报的结果
田忌可采用的策略一共有6种，但只有
一种是唯一可以获胜的。
5、说一说：田忌的这种策略在生活中
还有哪些应用？结合实际说一说。
三、巩固新知
1、数学游戏：
学生讲田忌赛马
的故事
思考问题
学生将表格填写
完整
学生分组讨论
学生通过对照表
找到答案
汇报讨论结果
学生举生活中的
实例
如乒乓球团体比
赛等
通过讲故事，使
学生体会对策论
在实际生活中应
用。
使学生认识到解
决问题策略的多
样性，形成寻找
解决问题最优方
案的意识。
使学生体会对策
论在生活中的应
用。
The first: to implement e treatment,
safe developmentch, protect the safety of
employees in the enterprise production, carbon
company equipment to ensure safe and reliable
operation, these provisions are formulated.
Article II: according to the provisions of the
People's Republic of China production safety law
and other relevant laws and regulations of the
State, to limit the carbon system of work safety
requirements and management of the company.
Article III: the company adopted the
administrative Chief for the security
responsibility at all levels of responsibility
system for production safety, establish a multi-
level safety system, guarantee system and
production safety supervision system, goals of
guaranteeing safe production. Fourth:
organizations at all levels within their
respective scope of work for which the company
around unified deployment, relying on staff to do
production safety work. Article fifth units of the
company should
be based on States, relevant
industry and group companies under the relevant
laws, regulations, standards, and make the unit's
rules and regulations, the institutionalization
and standardization of safety production
standardization. Sixth: the units of the company
to implement the safeple, plan, layout,
inspection, summary and assessment. The seventh
article: new construction, renovation or expansion
projects (hereinafter referred to as project)
safety devices, must be the main part of the
project designed, built and put into production
and use. Eighth: units should actively promote
safety assessment and risk analysis, improvement
of working environment, consolidate enterprise
security infrastructure, improve the level of
safety management. Safety policy and objectives in
section II the Nineth: carbon companies overall
safety policy, goals are: safety principles:
adherence to the on first and comprehensive
treatment, safe developmentch.
Safety goals:
1, no personnel injured group of dead accident 2,
personal injury accident 3 and above does not
occur, without significant equipment damage
accidents and above 4, no major equipment overhaul
quality accident 5, major fires and above do not
occur. 6, does not give rise to traffic accidents.
3 7, personal injury accidents per thousand. 8,
the e wastesne with national standards, larger,
major pollution accidents to zero. 9, hidden rate
up to 100%. The tenth article: carbon target
levels of safety production control company: (a)
control injuries and accidents, physical death,
not a major equipment failure; (B) workshop
injuries and disorders, personal injuries and
accidents do not occur; (C) the team attempted to
control and abnormal, absence of physical injuries
and disorders. The 11th article: carbon units of
the company in accordance with the provisions of
the safety goals of the entity, and the
implementation of Division and implement. Safety
responsibility system in
section III article
12th administrative job is our safety
responsibility, work safety and safety of this
enterprise objective overall responsibility. 13th:
the Executive job as security responsibility for
the basic functions: (a) is responsible for
establishing and implementing the business leaders
at all levels, departments
新人教版小学数学四年级上册全册教案 1、两人轮流报数，每次只能报1或
2，把两人报的所有数加起来，谁报数
后和是10，谁
就获胜。
想一想：如果让你先报数，为了确保获
胜，你第一次应该报几？接下来应该怎
么报？
说明游戏规则
2、两人轮流报数，必须报不大于5的
自然数，把两人报的数依次加起
来，谁
报数后和是100，谁获胜。：如果让你
先报数，为了获胜，你第一次报几？以
后怎么报？
四、小结：
这节课你有什么收获？
五、作业：
写一篇数学日记
独立完成后，小
组交流结果
同桌两人一组来
玩这个游戏。小
组内讨论问题，
汇报交流
学玩游戏
通过练习，巩固
所学的知识，使
学生感受到数学
在日常生活中的
广泛应用，尝试
用数学的方法解
决生活中的简
单
问题。
第十单元
总复习
第一课时
课题 复习多位数的认识 课型 复习课
教
知识与技能：1、通过复习，巩固所学的计数单位和相邻两个单位之间的进
学
率，掌握数位顺序表，能正确地读写大数，掌握改写和省略的方法。2、进
目 一步培养学生的数感。
标 过程与方法：使学生参与复习的全过程，通过合作交流等活动，使学生形成
知识网络。
情感、态度和价值观：
培养学生的反思意识和合作精神。
重点
数的概念、读写数的方法、改写和省略的方法
难点
数中间和末尾有0的读写法、用四舍五入法求近似数
教具 题卡
教 教师导学
学生活动 教学意图
of responsibility system for
production safety; (B) the organizations implement
the relevant safety instructions, important
documents, coordinate and solve the problems in
the sector in the follow-up; (C) to understand the
safety, supervision, inspection, safety, regularly
receive reports safety supervision departments.
Chaired a security analysis of monthly meetings,
timely research to solve major problems arising in
the work of production safety; (D) ensure safety
oversight agencies and their staff to meet the
requirements to support safety supervision
departments to perform their duties; (E) ensure
accident prevention measures and safety
requirements for technical protection measures and
use; the cost of ensuring safety award and use;
(F) set the unit's production emergencies
emergency plans, and, after emergency relief,
rescue and recovery work; (VII) faithfully and
promptly report accidents to the relevant
authorities; (VIII) other specific duties in the
relevant safety regulations. 14th:
Chief
Deputy is in charge of the work of the enterprises
within the scope of the security responsibility,
within the scope of the responsibilities of
leadership responsibility for work safety, its
accountability to the Chief. 15th: units and
positions should have clear security
responsibilities, burden-sharing and a subordinate
to a superior safety level of accountability.
16th: the company implements the safe production
responsibility system, including responsibility
for any grass-roots. Fourth quarter safety
supervision article 17th: company set up a safety
monitoring system, practicing the company,
workshops, team three-tier security system,
achieving security supervision of superior to
subordinate. 18th: safety oversight body to
exercise safety oversight functions. Safety
supervisory body superior safety supervision
authority on business leadership, qualification
and personnel of institutions eligible to receive
superior safety review of the supervisory
authority. 19th: full-time security oversight body
of
the company; the shop, the team has no
independent oversight bodies, must be full time or
part time security officers, safety supervisors,
workplace safety, team security officer grade
safety net. 20th: carbon company's safety
oversight body by the Executive ... Serving as.
22nd: the responsibility of security: (a) monitor
implementation of responsibility system for
production safety at all levels of the entity
supervising the safety regulations, accident
prevention measures and the implementation of
relevant safety instructions; (B) monitoring
involves the technical condition of equipment,
facilities, security, personal security protection
status; found in the supervision and inspection of
key issues and risks, to release security notice
in a timely manner within a solution, and report
to the supervisor; (C) the Organization preparing
the security plan of technical protecton measures
and supervision requirements for extraction and
use, monitoring the implementation of the plan of
supervising labor
supplies, security equipment,
security, acquisition, distribution and use of
protective equipment; (D) to oversee the
implementation of safety training program
organized or cooperate with the security
examination of the work procedures and safety
culture; (E)
学
过
程
一、 复习整理：
1、本节课对“多位数的认识”这
部分知识进行整理和复习。
板书课题：复习多位数的认识
2、打开数学书看第一单元的内
容，看看本单元都学习了哪些内
容？
哪个小组愿意汇报你们组的交流
情况？
老师指导并归纳，总结在黑板
上。
问：你认为本单元哪些内容比较
难？你最容易出错？
二、复习知识点
学生看书，小组合
作进行归纳
交流汇报补充
把计数单位按一定
的顺序排列起来，
它们所在的位置，
叫做数位
所学的数位有个
位、十位、百位、
千位、万位、十万
1、复习数位顺序表
位、百万位、千万
1）什么叫数位、计数单位、数级
位
2）每相邻两个计数单位之间有什
所学的计数单位
么关系？
有：个、十、百、
10个一万是十万
千、万、十万、百
10个十万是一百万
万、千万；计数单
10个一百万是一千万
位与数位的字面的
10个一千万是一亿
区别是没有“位”
3）每相邻的两个计数单位之间的
字
进率都是十，这种计数方法叫十
四位一分级，分为
进制计数法
。
个级、万级、亿级
4）自然数的认识
表示物体个数的1、2、3、4、
5、6、7、8、9、10、11„„都
是自然数，一个物体也没有，用
最小的自然数是
0表示，0也是自然数。
0
，没有最大的自
问：最小的自然数是几？有没有
然数，自然数的个
最大的自然数？自然
数的个数是
数是无限的。
无限的还是有限的？
2、多位数的读写法的方法是什么？
3、改写和省略的方法是什么？
4、如何比较数的大小？
三、练习内容
1、读出下面各数。
4231579 30050082 3960400000
7000700070
26740020000
5
2、从高位读起，一级
一级往下读
。②读亿
级或万级的数，先按
照个级的读法读，再
在后面加上一个
“亿”字或
“万”
700300009
字。③数中间有一个
只读一个零；每级末
整理归纳所学知
识，构建知识结
构，掌握和理解知
识间的联系。
。
复习数位顺序表等
有关知识，使学生
进一步掌握数的基
本概念
教
学
过
程
掌握读写数的方
法、改写和省略的
方法及比大小的方
法
315400000
0或连续有几个0，都