问题描述: (0.25+0.125)/(0.75*0.4)(是要简便运算的) 1个回答 分类:数学 2014-12-13 问题解答: 我来补答 (0.25+0.125)/(0.75×0.4)=(0.125×2+0.125)/(0.125×2×3×0.4)=[0.125×(2+1)]/(0.125×2×3×0.4)=(2+1)/(2×3×0.4)=3/(2×3×0.4)=1/(2×0.4)=(1×5)/(2×0.4×5)=5/4 展开全文阅读