问题描述: 1/6+1/30+1/70+1/126+1/198 1个回答 分类:数学 2014-11-07 问题解答: 我来补答 1/6+1/30+1/70+1/126+1/198=(1/6+1/30)+1/70+1/126+1/198=1/5+1/70+1/126+1/198=3/14+1/126+1/198=28/126+1/198=4/9+1/198=89/198 再问: 1/6+1/30+1/70+1/126+1/198 再答: 1/6+1/30+1/70+1/126+1/198 =1/5+1/70+1/126+1/198 =3/14+1/126+1/198 =2/9+1/198 =45/198 =5/22 展开全文阅读