问题描述: 18.76乘以9.9加18.76(简便运算). 1个回答 分类:数学 2014-09-25 问题解答: 我来补答 18.76*9.9+18.76 =18.76*9.9+18.76*1 =18.76*(9.9+1) =18.76*10.9 =18.76*(10+0.9)=18.76*10+18.76*0.9=187.6+18.76*(1-0.1)=187.6+(18.76*1-18.76*0.1)=187.6+18.76-1.876=204.484 展开全文阅读