求解一道计算题,要用简便算法:0.125*3.2+0.125*5.8-1/8

问题描述:

求解一道计算题,要用简便算法:0.125*3.2+0.125*5.8-1/8
务必答对
1个回答 分类:数学 2014-12-06

问题解答:

我来补答
0.125*3.2+0.125*5.8-1/8
=0.125*8*0.4+0.125*5.8-0.125
=1*0.4+0.125*5+0.125*0.8-0.125
=0.4+0.125*(5-1)+0.1
=0.4+0.5+0.1
=1
 
 
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