问题描述: 简便方法:2.71×6.5+0.21×27.1+2.71 1个回答 分类:数学 2014-10-19 问题解答: 我来补答 =2.71x6.5+2.1x2.71+2.71x1=2.71x(6.5+2.1+1)=2.71x9.6=26.016 展开全文阅读