(0.39×0.7)÷(0.56×3.9) 简便计算
问题描述:
(0.39×0.7)÷(0.56×3.9) 简便计算
答
(0.39*0.7)/(0.56*3.9)
=(0.39*0.7)/(0.7*0.8*0.39*10)
=1/(0.8*10)
=1/8