答案:1/4解析:3/4-1/6-1/3=18/24-4/24-8/24=6/24=1/4
3/4-1/6-1/3=1/4通分:9/12-2/12-4/12=3/12=1/4
3/4-1/6-1/3=9/12-2/12-4/12=3/12=1/4