10/[9/8/(7/6/5/4)]/3/2 要简便计算
问题描述：
10/[9/8/(7/6/5/4)]/3/2 要简便计算
答
10/[9/8/(7/6/5/4)]/3/2
=10/[9/8/(7/120)]/6
=10/(9/8*120/7)/6
=10/(9*15/7)/6
=10*7/(9*15)/6
=70/(9*15*6)
=7/81