(0.875-1/8)*(7/9-2/3)用简便计算

问题描述:

(0.875-1/8)*(7/9-2/3)用简便计算

(0.875-1/8)*(7/9-2/3)
=(7/8-1/8)*(7/9-6/9)
=6/8*1/9
=6/72
=1/12