四年级上册三位数乘两位数计算题
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三位数乘两位数计算题
一、口算
(
1
)仔细观察,并计算
12
×
5=
13
×
6=
27
×
3=
52
×
8=
12
×
50=
13
×
60=
27
×
30=
52
×
80=
120
×
50=
130
×
60=
270
×
30=
520
×
80=
(
< br>2
)你一定能够快速算一算
250
×
80=
300
×
60=
500
×
22=
400
×
80=
650
×
20=
800
×
60=
900
700
×
21=
700
×
80=
400
730
×
40=
250
×
44=
125
350
×
40=
420
×
50=
43
450
×
30=
150
×
60=
380
308
×
70=
75
×
400=
89
140
×
40=
150
×
60=
125
二、估算
603
×
21
≈
399
×
42
≈
301
×
38
≈
98
×
221
< br>≈
713
×
49
≈
321
×
18
≈
248
×
42
≈
126
×
79
≈
三、笔算
(
1
)
列竖式计算
783×45
=
146×58
=
196
×19
=
542×32
=
139×64
=
378×23
=
369×56
=
269×45
=
552×13
=
453×
27=
×
11=
270
×
25=
800
×
80=
107
×
200=
550
×
20=
210
×
100=
64
×
40= 500
×
48
≈
798
×
19
≈
79
×
47
≈
375
×
39
≈
456×37
=
752×14
=
756×21
=
789×35
=
524×26
=
375×53
=
547×12
=
695×89
=
743×1
64=
486×54
=
468
×
20=
×
12=
×
90=
×
20=
×
60=
×
300=
×
40=
×
82
≈
×
502
≈
×
19
≈
<
/p>
795×
51
≈
256×33
=
753×15
=
615×34
=
362×45
=
×
74=
538
151
208
150