2.9*0.45+0.29*4.2+0.

问题描述:

2.9*0.45+0.29*4.2+0.
1个回答 分类:数学 2014-10-18

问题解答:

我来补答
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
 
 
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