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脱式计算(能简便的要用简便方法计算) (1)16+15+13(2)712+16-14(3)8

2022-08-14 02:46:22 问答库 阅读 200 次

问题详情

脱式计算(能简便的要用简便方法计算) (1)1

6

+1

5

+1

3

(2)7

12

+1

6

-1

4

(3)8

11

+7

15

-8

15

(4)7-(3

4

-1

5

)(5)4

5

-(4

15

+1

3

)(6)4

7

+5

21

-4

7

+2

21

参考答案

(1)16+15+13,
=1130+13,
=710;

(2)712+16-14,
=34+14,
=1;

(3)811+715-815,
=811-115,
=109165;

(4)7-(34-15),
=7-1120,
=6920;

(5)45-(415+13),
=45-915,
=15;

(6)47+521-47+221,
=(47-47)+(521+221),
=0+13,
=13.

考点:方法