问题描述： 1.345*0.345*2.69-1.345*1.345*1.345-1.345*0.345*0.345 1个回答 分类：数学 2014-12-05 问题解答： 我来补答 =1.345*0.345*(2.69-0.345)-1.345*1.345*1.345 =1.345*0.345*2.345-1.345*1.345*1.345 =1.345*[(1.345-1)(1.345+1)-1.345*1.345]=1.345*(-1)=-1.345 展开全文阅读
