把下面每组分数通分,再比较大小，5/6和10/13时13/5和8/9，4/9和5/125/6=65/78,10/13=60/78,5/6＞10/13.13/5=117/45,8/9=40/45,13/5＞8/9.4/9=16/36,5/12=15/36.4/9＞5/12.请采纳,谢谢.
