{15/29 - (0.25+1/3)*7.2}/14/5

问题描述:

{15/29 - (0.25+1/3)*7.2}/14/5
1个回答 分类:数学 2014-10-31

问题解答:

我来补答
{29/15 - (0.25+1/3)*7.2}/14/5
=[29/15-(1/4+1/3)*36/5]*5/14
=(29/15-7/12*36/5)*5/14
=(29/15-21/5)*5/14
=29/15*5/14-21/5*5/14
=29/42-3/2
=-34/42
=-17/21
 
 
展开全文阅读
剩余:2000