12.5-3.25*1.8简便算法
问题描述:
12.5-3.25*1.8简便算法
答
12.5-3.25*1.8=1.25-3.25-3.25×0.8=-2-2.6=-4.6
答
(14.4-4.8+3)÷0.4 7. [58.8÷(6×0.07)+1.5]×0.4 解1.计算下面各题,能用简便算法的用简便算法 (1)12.25-3.1+0.85-
答
12.5-3.25*1.8
=12.5-12.5*0.26*1.8
=12.5(1-0.468)
=12.5*0.532
=12.5*8*0.0665
=100*0.0665
=6.65