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计算下面各题 怎样简便就怎样计算. 2-32×1021-2729×4+29×5(13+14-

2022-08-14 02:59:43 问答库 阅读 200 次

问题详情

计算下面各题,怎样简便就怎样计算. 2-3

2

×10

21

-2

7

2

9

×4+2

9

×5(1

3

+1

4

-1

6

)×24

8

17

÷7+1

7

×9

17

7

8

÷(1

4

+1

3

)[1-(1

4

+3

8

)]÷1

2

3

4

×2

3

+1

3

÷5

6

4

5

×3

4

÷3

8

5

8

+3

4

÷15

16

+3

8

参考答案

(1)2-32×1021-27,
=2-57-27,
=2-(57+27),
=2-1,
=1;

(2)29×4+29×5,
=29×(4+5),
=29×9,
=2;

(3)(13+14-16)×24,
=13×24+14×24-16×24,
=8+6-4,
=14-4,
=10;

(4)817÷7+17×917,
=817×17+17×917,
=(817+917)×17,
=1×17,
=17;

(5)78÷(14+13),
=78÷712,
=32;

(6)[1-(14+38)]÷12,
=[1-58]÷12,
=38÷12,
=34;

(7)34×23+13÷56,
=12+25,
=910;

(8)45×34÷38,
=45×34×83,
=85;

(9)58+34÷1516+38,
=58+45+38,
=(58+38)+45,
=1+45,
=145.

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