85/4+15/4 321*654/987/654*987/321 简便计算要过程.
问题描述:
85/4+15/4 321*654/987/654*987/321 简便计算要过程.
答
85/4+15/4
=(85+15)/4
=100/4
=25
321*654/987/654*987/321
=321/321*654/654*987/987
=1