(7/8+1/6)×14/15-5/12的差等于
简便计算：
=7*14/8*15+1*14/6*15-5/12
=49/60+7/45-25/60
=24/60+7/45
=6/15+7/45
=25/45
=5/9
简便计算方法：(7/8+1/6)×14/15-5/12=(21/24+4/24)×14/15-5/12=5×14/24×15-2/12=7/36-6/36=1/36
原式=5/9
