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正确 合理 灵活的计算下面各题. (12+13-56)×1.20.25×32×1.2515×

2022-08-14 02:32:59 问答库 阅读 200 次

问题详情

正确、合理、灵活的计算下面各题. (1

2

+1

3

-5

6

)×1.20.25×32×1.251

5

×7.5+(1-4

5

2

5

23

5

×1.25+11

4

×2.4-125%15

16

×(7

8

-1

4

1

2

参考答案

(1)(12+13-56)×1.2,
=12×1.2+13×1.2-56×1.2,
=0.6+0.4-1,
=1-1,
=0;

(2)0.25×32×1.25,
=(0.25×4)×(8×1.25),
=1×10,
=10;

(3)15×7.5+(1-45)÷25
=15×7.5+15÷25
=(7.5+52)×15
=10×15
=2;

(4)235×1.25+114×2.4-125%,
=(235+2.4-1)×114
=4×114
=5;

(5)1516×(78-14)÷12
=1516×58÷12
=75128÷12
=11164

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