(完整版)整数乘除法简便计算分类练习题(带答案)
余年寄山水
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2021年01月26日 00:28
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整数乘除法简便计算分类练习题
1
、凑整
25
×
32
×
125
=(25
×
4)
×
(8
×
125)
=100
×
1000
=100000
937
×
125
×
25
×
6 4
×
5
=937
×
(125
×
8)
×
(25
×
4)
×
(5
×
2)
=937
×
1000
×
100
×
10
=937000000
80
×
16
×
25
×
125
=(80
×
125)
×
(25
×
4)
×
4
=10000
×
100
×
4
=4000000
125
×
5
×
32
×
5
=(125
×
8)
×
(5
×
2)
×
(5
×
2)
=1000
×
10
×
10
=100000
56
×
125
=7
×
(8
×
125)
=7
×
1000
=7000
2
、利用乘法分配律简算
46
×
101
=46
×
(100+1)
=46
×
100+46
×
1
=4600+46
=4646
17
×
999
=17
×
(1000-1)
=17000-17
=16983
125
×
98
=125
×
(100-2)
=12500-250
=12250
37
×
99
=37
×
(100-1)
=3700-37
=3663
234
×
102
=234
×
(100+2)
=23400+468
=23868
1
(100
－
4)
×
25
=100
×
25-4
×
25
=2500-100
=2400
3
、逆用乘法分配律简算
95
×
71
＋
95
×
29
=95
×
(71+29)
=95
×
100
=9500
64
×
25
＋
35
×
25
＋
25
=25
×
(64+35+1)
=25
×
100
=2500
123
×
235
－
24
×
2 35
＋
235
=235
×
(123-24+1)
=235
×
100
=235
586
×
124
＋
29
×
586
－
586
×
53
=586
×
(124+29-53)
=586
×
100
=58600
62×38＋38×38
=38
×
(62+38)
=38
×
100
=3800
54×154－45×54－54×9
=54
×
(154-45-9)
=54
×
100
=5400
67×12＋67×35＋67×52＋
67
=67
×
(12+35+52+1)
=67
×
100
=6700
4
、
利用商不变的性质简算
(
分子分母同时乘以相同的数、商不变
)
21000÷125
=
21000
×
8
÷
(125
×
8)
=168000
÷
1000
=168
110÷5
=110
×
2
÷
(5
×
2)
=220
÷
10
=22
44000÷125
=44000
×
8
÷
(125
×
8)
=352000
÷
1000
=352
47700÷900
=47700
÷
100
÷
(900
÷
100)
=477
÷
9
=53
2