(1.9-1.9*0.9)/(3.8-2.8)的简便算法
问题描述:
(1.9-1.9*0.9)/(3.8-2.8)的简便算法
答
(1.9-1.9*0.9)/(3.8-2.8)
=1.9*(1-0.9)/1
=1.9*0.1
=0.19