(84-84/7)*5的简便算法
问题描述:
(84-84/7)*5的简便算法
答
(84-84/7)*5
=84*5*(1-1/7)
=420*6/7
=360
(84-84/7)*5的简便算法
(84-84/7)*5
=84*5*(1-1/7)
=420*6/7
=360