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计算下面各题 能简便计算的要简便计算. 1÷(1+58÷5)(12+16)×(13-14)1

2022-08-14 02:45:39 问答库 阅读 200 次

问题详情

计算下面各题,能简便计算的要简便计算. 1÷(1+5

8

÷5)(1

2

+1

6

)×(1

3

-1

4

)

14

25

×24+14

25

5

7

×5

9

+4

9

÷7

5

4-10

21

÷2

3

-2

7

9

8

-2

7

+7

8

-5

7

参考答案

(1)1÷(1+58÷5),
=1÷(1+18),
=1÷98,
=89;

(2)(12+16)×(13-14),
=23×112,
=118;

(3)1425×24+1425,
=1425×(24+1),
=1425×25,
=14;

(4)57×59+49÷75,
=57×59+49×57,
=57×(59+49),
=57×1,
=57;

(5)4-1021÷23-27,
=4-57-27,
=4-(57+27),
=4-1,
=3;

(6)98-27+78-57,
=(98+78)-(27+57),
=2-1,
=1.

考点: