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脱式计算38÷[(15+14)×38]35-45×16÷35720÷〔711×(5-43)〕

2022-08-14 03:02:07 问答库 阅读 200 次

问题详情

脱式计算
3

8

÷[(1

5

+1

4

)×3

8

]
3

5

-4

5

×1

6

÷3

5


7

20

÷〔7

11

×(5-4

3

)〕
(1

2

+1

3

)÷5

8

-1

3


76.9÷[1÷(3.1-3.09)]
(0.72+6.58÷0.7)×0.5.

参考答案

(1)38÷[(15+14)×38]
=38÷[920×38]
=38×16027
=209;

(2)35-45×16÷35
=35-215÷35
=35-29
=1745;

(3)720÷[711×(5-43)]
=720÷[711×113]
=720×37
=320;

(4)(12+13)÷58-13
=56×85-13
=43-13
=1;

(5)76.9÷[1÷(3.1-3.09)]
=76.9÷[1÷0.01]
=76.9÷100
=0.769;

(6)(0.72+6.58÷0.7)×0.5
=(0.72+9.4)×0.5
=10.12×0.5
=5.06.

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