1/3+1/6+1/9+1/18+1/36
=1/36+1/18+1/9+1/6+1/3
=1/36+2/36+1/9+1/6+1/3
=3/36+1/9+1/6+1/3
=3/36+4/36+6/36+12/36
=25/36
这个题目是求分母通分就好了
1/3+1/6+1/9+1/18+1/36
=1/36+1/18+1/9+1/6+1/3
=1/36+2/36+1/9+1/6+1/3
=3/36+1/9+1/6+1/3
=3/36+4/36+6/36+12/36
=25/36
这个题目是求分母通分就好了