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计算下面各题 注意使用简便算法.910÷74+37×910(1415-59-15)×4567

2022-08-14 02:39:38 问答库 阅读 200 次

问题详情

计算下面各题,注意使用简便算法.
9

10

÷7

4

+3

7

×9

10

(14

15

-5

9

-1

5

)×45

6

7

+7

9

×3

2

+5

6

3÷3

5

-3

5

÷36÷1

5

÷3

5

÷5[5

6

-(2

5

+1

3

)]×5

7

5

11

×1

2

÷5

11

×1

2

3

4

÷8+3

4

÷8

7

8

15

×7

9

-7

15

×7

9

参考答案

(1)910÷74+37×910
=910×47+37×910
=910×(47+37)
=910;

(2)(1415-59-15)×45
=1415×45-59×45-15×45
=42-25-9
=17-9
=8;

(3)67+79×32+56
=67+76+56
=67+(76+56)
=67+2
=267;

(4)3÷35-35÷3
=5-15
=445;

(5)6÷15÷35÷5
=30÷35÷5
=50÷5
=10;

(6)[56-(25+13)]×57
=[56-1115]×57
=110×57
=114;

(7)511×12÷511×12
=(511÷511)×(12×12)
=1×14
=14;

(8)34÷8+34÷87
=34×18+34×78
=34×(18+78)
=34;

(9)815×79-715×79
=(815-715)×79
=115×79
=7135.

考点:算法