问题描述: 【0.75*42.7-0.573*25+57.3】/3*7972 简便计算 1个回答 分类:数学 2014-11-15 问题解答: 我来补答 原式=[0.75×42.7-57.3×0.25+57.3×1]÷3×7972 =[0.75×42.7-(1-0.25)×57.3]÷3×7972 =[0.75×(42.7+57.3)]÷3×7972 =0.75×100÷3×7972 =75÷3×7972 =25×7972 =199300希望采纳,成为最佳答案哦~ 展开全文阅读