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计算下面各题.(能简便的就简便)715×14+715(712+124)÷12928×14×4

2022-08-14 02:40:32 问答库 阅读 200 次

问题详情

计算下面各题.(能简便的就简便)
7

15

×14+7

15

(7

12

+1

24

)÷1

2

9

28

×14×4

9

12÷5

6

×5

12

14

5

÷2

5

÷1

7

1

4

÷5

6

×5

12

(5

14

+5

7

)÷6

7

1

3

×(4

5

-5

7

)

参考答案

(1)715×14+715
=715×(14+1)
=715×15
=7;

(2)(712+124)÷12
=712×2+124×2
=76+112
=114;

(3)928×14×49
=928×49×14
=17×14
=2;

(4)12÷56×512
=12×512÷56
=5÷56
=6;

(5)145÷25÷17
=145÷(25×17)
=145÷235
=49;

(6)14÷56×512
=310×512
=18;

(7)(514+57)÷67
=1514÷67
=114;

(8)13×(45-57)
=13×335
=135.

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