=(1/2+1/3+1/6)+(1/4+1/5+1/10)+1/7+1/8+1/9=1+11/20+1/8+1/7+1/9=1+27/40+1/9+1/7=1+283/360+1/7=1+2341/2520=4861/2520希望能够帮助你!数学辅导团团队为您解答!