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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