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用合理的方法计算.116÷[125×(25+110)]5.6×334-425×3.75+0.

2022-08-14 02:46:33 问答库 阅读 200 次

问题详情

用合理的方法计算.
1

16

÷[1

25

×(2

5

+1

10

)]
5.6×33

4

-42

5

×3.75+0.88×371

2


(9473

5

+9419

25

+9.476+0.9476)÷0.1111
2011×(3.4×69+3.5)

3.5×69-3.4

参考答案

(1)116÷[125×(25+110)],
=116÷[125×(410+110)],
=116÷[125×12],
=116÷150,
=116×50,
=258;

(2)5.6×334-425×3.75+0.88×3712,
=5.6×3.75-4.4×3.75+0.88×37.5,
=5.6×3.75-4.4×3.75+8.8×3.75,
=(5.6-4.4+8.8)×3.75,
=10×3.75,
=37.5;

(3)(94735+941925+9.476+0.9476)÷0.1111,
=(947.6+94.76+9.476+0.9476)÷0.1111,
=(9476×0.1+9476×0.01+9476×0.001+9476×0.0001)÷0.1111,
=[(0.1+0.01+0.001+0.0001)×9476]÷0.1111,
=0.1111×9476÷0.1111,
=9476;

(4)2011×(3.4×69+3.5)3.5×69-3.4,
=2011×[3.4×(70-1)+3.5][(3.4+0.1)×69-3.4],
=2011×(3.4×70+0.1)3.4×69+3.5,
=2011×(3.4×70+0.1)3.4×70+0.1,
=2011.

考点:方法