题目内容

【题目】计算下面各题,能简算的要简算。

8.57-(3.57+0.29) 13.2÷(14.7-1.6-2.1)

5.7×9.8+0.57+0.57 1.25×3.2×2.5

【答案】4.71; 1.2; 57; 10

【解析】

8.57-(3.57+0.29)

=8.57-3.57-0.29

=5-0.29

=4.71

13.2÷(14.7-1.6-2.1)

=13.2÷(14.7-3.7)

=13.2÷11

=1.2

5.7×9.8+0.57+0.57

=5.7×9.8+5.7×0.1+5.7×0.1

=5.7×(9.8+0.1+0.1)

=5.7×10

=57

1.25×3.2×2.5

=(1.25×8)×(0.4×2.5)

=10×1

=10

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