(1.75-0.875-7/12)/(-7/8)+(-7/8)/(1.75-0.875一7/12)
问题描述:
(1.75-0.875-7/12)/(-7/8)+(-7/8)/(1.75-0.875一7/12)
简便
答
(1.75-0.875-7/12)/(-7/8)+(-7/8)/(1.75-0.875-7/12)
=-1+2/3-1+2/3
=-2/3