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3÷〔9×(127-136)〕×1293.6÷〔(6-2.88)×(578-1.875)〕7

2022-08-14 02:42:12 问答库 阅读 200 次

问题详情

3÷〔9×(1

27

-1

36

)〕×12
93.6÷〔(6-2.88)×(57

8

-1.875)〕
7.05×37+64×7.05-7.05
(22

9

×4

5

+22

9

×6.2-5.8×22

9

-1

5

÷9

20

)×9

20


84

5

÷〔7.8+1

4

×(2.75+1.25)〕
8.1÷(41

7

-0.05×70)÷12

7

参考答案

(1)3÷[9×(127-136)]×12,
=3÷[9×127-136×9]×12,
=3÷[13-14]×12,
=3÷112×12,
=36×12,
=432;

(2)93.6÷[(6-2.88)×(578-1.875)],
=93.6÷[3.12×4],
=93.6÷12.48,
=7.5;

(3)7.05×37+64×7.05-7.05,
=7.05×(37+64-1),
=7.05×100,
=705;

(4)(229×45+229×6.2-5.8×229-15÷920)×920,
=(209×0.8+209×6.2-5.8×209-209×0.2)×920,
=[209×(0.8+6.2-5.8-0.2)]×920,
=[209×1]×920,
=209×920,
=1;

(5)845÷[7.8+14×(2.75+1.25)],
=845÷[7.8+14×4],
=845÷(7.8+1),
=8.8÷8.8,
=1;

(6)8.1÷(417-0.05×70)÷127,
=8.1÷(417-3.5)÷127,
=8110÷914÷97,
=8110×149×79,
=495.

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