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脱式计算 怎样简便就怎样算.23×1439+14×163914317-6.46-3.5411

2022-08-14 02:20:38 问答库 阅读 200 次

问题详情

脱式计算,怎样简便就怎样算.
23×14

39

+14×16

39

143

17

-6.46-3.541

13

+12

13

×(5

2

-1

3

)

3

13

×3

4

+10

13

÷4

3

3×(2

15

+1

12

)-1

4

(12

3

-12

5

)÷(6-2

7

)×42

7

参考答案

(1)23×1439+14×1639
=1439×(23+16)
=1439×39
=14;

(2)14317-6.46-3.54
=14317-(6.46+3.54)
=14317-10
=4317

(3)113+1213×(52-13
=113+1213×52-1213×13
=113+3013-413
=2713

(4)313×34+1013÷43
=313×34+1013×34
=34×(313+1013)
=34

(5)3×(215+112)-14
=3×215+3×112-14
=615+14-14
=25

(6)(123-125)÷(6-27)×427
=1415÷557×427
=1915×740×307
=1920

考点: