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