这俩不相等!5/18+2/9=5/18+4/18=9/18而1/3+5/6=6/18+15/18=21/18两个式子差12/18
5/18+2/9
=5/18+4/18
=1/2
1/3+5/6
=2/6++5/6
=7/6
故答案为:1/2 7/6