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脱式计算(能用简便方法的用简便方法计算)[(716-14)+1516]÷126134-15.

2022-08-14 02:45:54 问答库 阅读 200 次

问题详情

脱式计算(能用简便方法的用简便方法计算)
[(7

16

-1

4

)+15

16

]÷1

2


613

4

-15.37+381

4

-34.63
23-8

9

×3

8

÷1

27


5.8×99-4.2
10.6-(6.3+0.125÷12.5%)

参考答案

(1)[(716-14)+1516]÷12,
=[316+1516]÷12,
=1816÷12,
=2.25;

(2)6134-15.37+3814-34.63,
=(6134+3814)-(15.37+34.63),
=100-50,
=50;

(3)23-89×38÷127,
=23-39÷127,
=23-9,
=14;

(4)5.8×99-4.2,
=5.8×(100-1)-4.2,
=580-5.8-4.2,
=580-(5.8+4.2),
=580-10,
=570;

(5)10.6-(6.3+0.125÷12.5%),
=10.6-(6.3+1),
=10.6-7.3,
=3.3.

考点:方法