问题描述: 简算:7142.85/3.7/2.7/1.7*0.7 1个回答 分类:数学 2014-10-30 问题解答: 我来补答 是乘以1.7吧?否则都除不尽了法一:把7142.85分解质因数即得7142.85=3*3*3*5*11*13*37*0.01=5*11*13*27*37*0.017142.85÷3.7÷2.7×1.7×0.7=5×11×13×27×37×0.01÷3.7÷2.7×1.7×0.7=5×11×13×27×37÷37÷27×1.7×0.7=5×11×13×1.7×0.7=850.85 法二:7142.85÷3.7÷2.7×1.7×0.7=7142.85÷37÷27×17×7 =7142.85×7÷999×17 =49999.95÷999×17 =50.05×17 =850.85 展开全文阅读