符合条件的分数有:
(1)
3
21 =
7
49 =
8
56 ;
(2)
3
6 =
7
14 =
29
58 ;
(3)
3
6 =
9
18 =
27
54 ;
(4)
3
27 =
6
54 =
9
81 ;
(5)
2
4 =
3
6 =
79
158 .(答案不唯一)
符合条件的分数有:
(1)
3
21 =
7
49 =
8
56 ;
(2)
3
6 =
7
14 =
29
58 ;
(3)
3
6 =
9
18 =
27
54 ;
(4)
3
27 =
6
54 =
9
81 ;
(5)
2
4 =
3
6 =
79
158 .(答案不唯一)