题目内容

【题目】用简便方法计算下面各题。

3.8×0.99 500×0.16×O.125 37×0.39+0.37×61

【答案】3.762;10;37

【解析】

3.8×0.99

=3.8×(1-0.01)

=3.8×l-3.8×O.01

=3.8-0.038

=3.762

500×0.16×0.125

=500×0.02×8×0.125

=(500×0.02)×(8×0.125)

=10×1

=10

37×0.39+0.37×61

=37×0.39+37×0.61

=37×(0.39 +0.61)

=37×l

=37

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