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脱式计算 能简算的要简算. 511×79+79×61151×10110.25-3.75-6.

2022-08-14 02:47:20 问答库 阅读 200 次

问题详情

脱式计算,能简算的要简算.

5

11

×7

9

+7

9

×6

11

51×10110.25-3.75-6.25+7.75

35×12+350÷703+0.7÷[(5

6

-1

4

)×24]

1

3

÷6

5

×9

10

参考答案


(1)511×79+79×611,
=(511+611)×79,
=1×79,
=79;

(2)51×101,
=51×(100+1),
=51×100+51×1,
=5100+51,
=5151;

(3)10.25-3.75-6.25+7.75,
=(10.25+7.75)-(3.75+6.25),
=18-10,
=8;

(4)35×12+350÷70,
=420+5,
=425;

(5)3+0.7÷[(56-14)×24],
=3+0.7÷[56×24-14×24],
=3+0.7÷[20-6],
=3+0.7÷14,
=3+0.05,
=3.05;

(6)13÷65×910,
=518×910,
=14.

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