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下面各题 怎样算简便就怎样算 (1)1516-(712+16)×12(2)(1-75%)÷(

2022-08-14 02:44:40 问答库 阅读 200 次

问题详情

下面各题,怎样算简便就怎样算 (1)15

16

-(7

12

+1

6

)×1

2

(2)(1-75%)÷(1+1

4

)(3)5

17

×9

24

+7

17

×9

24

(4)(2

5

-2

5

÷2)×5

3

(5)59÷[1÷(1

10

-9%)](6)1

5

×79+21×0.2.

参考答案

(1)1516-(712+16)×12,
=1516-34×12,
=1516-38,
=916;

(2)(1-75%)÷(1+14),
=14÷54,
=15;

(3)517×924+717×924,
=(517+717)×924,
=1217×924,
934;

(4)(25-25÷2)×53,
=(25-15)×53,
=15×53,
=13;

(5)59÷[1÷(110-9%)],
=59÷[1÷0.01],
=59÷100,
=0.59;

(6))15×79+21×0.2,
=(79+21)×0.2,
=100×0.2,
=20.

考点: