题目是这样吗:水果店有苹果3/4吨,卖出1/6吨,后又运来5/12吨,水果店现在有水果多少吨?3/4-(1/6)+5/12=9/12-(2/12)+5/12=7/12+5/12=1;
答:现在有水果3/4-1/6+5/12 =9/12-2/12+5/12 =1 吨
4/3-6/1+12/5=60/45-60/10+60/25=60/35+60/25=60/60=1