1.25*0.25*6.4*0.5简便运算
问题描述:
1.25*0.25*6.4*0.5简便运算
要讲讲为什么这样做,原因
答
1.25*0.25*6.4*0.5
=1.25*0.25*0.8*2*4*0.5
=(1.25*0.8)*(0.25*4)*(0.5*2)
=1*1*1
=1