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数学符号的英语读法

als and Ordinals

基数和序数

(1)100

以内的数词

基数

序数

Roman Arabic

Numerals Numerals

罗马数字

阿拉伯数字

读法

数码

读法

I 1 one 1st the first

II 2 two 2nd the second

III 3 three 3rd the third

IV 4 four 4th the fourth

V 5 five 5th the fifth

VI 6 six 6th the sixth

VII 7 seven 7th the seventh

VIII 8 eight 8th the eighth

IX 9 nine 9th the ninth

X 10 ten 10th the tenth

XI 11 eleven 11th the eleventh

XII 12 twelve 12th the twelfth

XIII 13 thirteen 13th the thirteenth

XIV 14 fourteen 14th the fourteenth

XV 15 fifteen 15th the fifteenth

XVI 16 sixteen 16th the sixteenth

XVII 17 seventeen 17th the seventeenth

XVIII 18 eighteen 18th the eighteenth

XIX 19 nineteen 19th the nineteenth

XX 20 twenty 20th the twentieth

XXI 21 twenty-one 21st the twenty-first

XXV 25 twenty-five 25th the twenty-fifth

XXX 30 thirty 30th the thirtieth

XL 40 forty 40th the fortieth

L 50 fifty 50th the fiftieth

LX 60 sixty 60th the sixtieth

LXX 70 seventy 70th the seventieth

LXXX 80 eighty 80th the eightieth

XC 90 ninety 90th the ninetieth

IC 99 ninety-nine 99th the ninety-ninth

C 100 one hundred 100th the hundredth

CII 102 a hundred 102nd the (one) hundred

and two and second

246 two hundred and forty-six

751 seven hundred and fifty-one

(2)1000

以上的数词

1,000 = one thousand

一千

10,000 = ten thousand

一万

100,000 = one hundred thousand

十万

1,000,000 = one million

一百万

10,000,000 = ten million

一千万

100,000,000=one hundred million

一亿

< /p>

(3)

十亿以上的大数，英美有不同的读法：

英国

美国

十亿

one thousand million = one billion

百亿

ten thousand million = ten billion

千亿

one hundred thousand million = one hundred billion

万亿

one billion = one trillion

ons

分数

通常将分子读为基数，将分母读为序数。

1/2 = a (or one) half

1/3 = a (or one) third

1/4 = a quarter or one fouth

1/5 = a (or one) fifth

2/3 = two thirds

9/10 = nine tenths

53/4 = five and three quarters

15/64= fifteen over (or by) sixty-four

15% = fifteen per cent

4‰ = four per mill

ls

小数

0.4 = zero (or

nought ) point four

.01 = point (or decimal) nought one

12.34 = twelve point three four

567.809 = five hundred and sixty-seven point eight nought nine

30.45 = thirty point four five, five recurring

0.3% = decimal three percent

atic Forms

数学式

(1) Addition

加法

1+2=3 One and two are three.

2+3=5 Two plus three equals five.

4+0=4 Four and nought is equal to four.

45+70+152=267 45,70 and 152 added are (or make) 267

the sum (or total) is 267.

演算时的读法：

Three and seven are ten; I write(or I write down,or I put

down)a nought

and

carry

one.

Four

and

one

that

I

carry

are

five,

and

eight

make

thirteen,and three

sixteen; I write down six and carry one. One and one (that I carry) are two;

I put down

two.- The sum (or total, or the result of the addition) is two hundred and

sixty. 37,80

and 143 added together, and(or make) 260.

(2)Subtraction

减法

9-4=5 Nine minus four equals (or is equal to) five.

15-7=8 Seven from fifteen leaves eight.

23,654-8,175=15,479

8,175

(take

or

subtracted)

from

23,654

leaves

15,479. The difference

(or The remainder) is 15,479.

Nine from five won`t go.

演算时的读法：

Nought

from

nought

(leaves)

nought.

One

from

one

leaves nought (or nothing).

Two from three (leaves) one. I can`t take (or subtract) five from four; I

must borrow ten;

five from fourteen leaves nine.- The difference (or The remainder) is nine

thousand one

hundred. 5210 (take or substracted) from 14,310 leaves 9,100.

(3)Multiplication

乘法

1×

0=0 One multiplied by nought equals nought.

1×

1=1 Once one is one.

2×

1=2 Twice one is two.

3×

5=15 Three times five is fifteen

6×

0=0 Multiply six by nothing, and the result is nothing.

演算时的读法

: Five times nine (or Nine multiplied by five) are forty-five;

I put down five

and carry four. Five times seven are thirty-five and four (that I carry) are

thirty-nine; I write

down

nine

and

carry

three.

Five

times

six

make

thirty

and three

(that

I

carry) thirty-three; I put

down thirty-three.

Eight

times

nine

(or

Eight

nine)

are

seven

two;

I

write

two

and

carry

seven. Eight sevens make

fifty-six and seven are sixty-three. I put down three and carry six. Eight

sixes make forty-eight

and six fifty-four; I write down fifty-four.

I now add the partial results (or products) Five. Two and nine are eleven.

Three and three are

six and one are seven. Four and three make seven. Five.

(4)Division

除法

9÷

3=3 Nine divided by three maks (or is equal to) three.

20÷

5=4 Five into twenty goes four times.

4567

÷

23=198

余

13 23 into 4567 goes 198 times, and 13 remainder.

The quctient is 198, and 13 remainder.

演算时的读法

: Fifteen into thirteen won`t go fifteen into one hundred

and thirty-eight goes nine

times;

nine

times

fifteen

are

one

hundred

and

threty-five;

one

hundred

and thirty-five from one hundred

and thirty- eight leaves three; I bring down seven; fifteen into thirty-seven

goes twice; twice fifteen

are thirty; thirty from thirty-seven leaves seven.

The

(exact)

quotient

is

ninety-two,

and

seven

remainder;

15

into

1387 goes 92 times, and 7 remainder.

时间

(1)Hours

钟点

2h.5'8

小时

< br>5

分

8

秒

6.18 = six eighteen 6

时

18

分

8.30 a.m.= eight thirty a.m.['ei 'em]

上午

8

时

30

分

the 6.05 = the six (nought) five p.m.['pi:'em] train

下午

6