我写给你计算过程:7/8-(3/8+1/6)=7/8-3/8-1/6=4/8-1/6=1/2-1/6=3/6-1/6=2/6=1/3
解:原式=7/8-3/8-1/6 =1/2-1/6 =3/6-1/6 =1/3
7/8-(3/8+1/6)=7/8-(9/24+4/24)=7/8-13/24=21/24-13/24=8/24=1/3