搜搜做题作业网(0.25+0.125)/(0.75*0.4)（是要简便运算的）
来源：学生作业帮 编辑：搜搜做题作业网作业帮 分类：数学作业 时间：2024/04/27 20:49:53
(0.25+0.125)/(0.75*0.4)（是要简便运算的）
(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
=(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