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计算(1)-16+23+(-17)-(-7)(2)0-12-(-34)+(-56)-23(3

2022-08-15 16:12:30 问答库 阅读 206 次

问题详情

计算
(1)-16+23+(-17)-(-7)
(2)0-1

2

-(-3

4

)+(-5

6

)-2

3


(3)2

5

÷(-22

5

)-8

21

×(-13

4

)-0.5÷2×7

2


(4)[21

2

-(7

9

-11

12

+1

6

)×36]÷5.

参考答案

(1)-16+23+(-17)-(-7)
=-16+23-17+7
=-33+30
=-3;

(2)0-12-(-34)+(-56)-23
=-612+912-1012-812
=-114;

(3)25÷(-225)-821×(-134)-0.5÷2×72
=-16+23-12×12×72
=-16+23-78
=-38;

(4)[212-(79-1112+16)×36]÷5
=[212-(28-33+6)]÷5
=[212-1]÷5
=32÷5
=310.

考点: