通分:3/51和2/17 5/12和7/18约分:13/169 35/140 24/48
问题描述:
通分:3/51和2/17 5/12和7/18约分:13/169 35/140 24/48
答
3/51和2/17 3/51,6/51
5/12和7/18 15/36,14/35
13/169 =1/13
35/140 =1/4
24/48=1/2