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下面各题 怎样筒便就怎样算. 18÷(4.49+34.3×0.2)813÷7+17×5131

2022-08-14 03:01:33 问答库 阅读 200 次

问题详情

下面各题,怎样筒便就怎样算. 18÷(4.49+34.3×0.2)

8

13

÷7+1

7

×5

13

11

10

-1

4

-3

4

+9

10

1

2

×3.2+5.6×0.5+1.2×50%

(9-3.06÷3

5

)×20

13

[1-(5

3

-1.5)÷5

12

]×0.75.

参考答案

(1)18÷(4.49+34.3×0.2)
=18÷(4.49+6.86)
=18÷11.35
=1133227;

(2)813÷7+17×513
=813×17+17×513
=(813+513)×17
=1×17
=17;

(3)1110-14-34+910
=(1110+910)-(14+34)
=2-1
=1;

(4)12×3.2+5.6×0.5+1.2×50%
=0.5×3.2+5.6×0.5+1.2×0.5
=(3.2+5.6+1.2)×0.5
=10×0.5
=5;

(5)(9-3.06÷35)×2013
=(9-5.1)×2013
=3.9×2013
=6;

(6)[1-(53-1.5)÷512]×0.75
=[1-16÷512]×0.75
=[1-25]×0.75
=35×0.75
=920.

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