望采纳,谢谢
3/4-1/6+1/3等于11/12,不用简便元算。3/4-1/6+1/3=9/12-2/12+4/12=7/12+4/12=11/12
3/4-1/6+1/3=3/4-1/6+2/6=3/4+1/6=9/12+2/12=11/12