问题描述: 计算:784070+78407.1+7840.72+784.073+78.4074=______. 1个回答 分类:数学 2014-11-03 问题解答: 我来补答 784070+78407.1+7840.72+784.073+78.4074=784070×(1+0.1+0.01+0.001+0.0001)+0.1+0.02+0.003+0.0004=784070×1.1111+0.1234=871180.3004故答案为:871180.3004. 展开全文阅读