101×5/11+103×3/11+102×3/11
=101x5/11+(103+102)x3/11
=101x5/11+205x3/11
=505/11+615/11
=(505+615)/11
=1120/11除不尽啊？？是的，除不尽，所以只好用分数表示。哦 谢谢了 O(∩_∩)O谢谢