1)1 12/13
2)5 5/9
3)1 6/7
4)1 8/9
5)4 4/5
12 1/13 - 10 2/13 = 1 12/13
7 2/9 - 1 5/9 = 5 2/3
3 3/7 - 1 4/7 - 5 1/9 = -3 16/63
6 4/5 - 1 3/3 = 4 4/5
1)1 12/13
2)5 5/9
3)1 6/7
4)1 8/9
5)4 4/5
12 1/13 - 10 2/13 = 1 12/13
7 2/9 - 1 5/9 = 5 2/3
3 3/7 - 1 4/7 - 5 1/9 = -3 16/63
6 4/5 - 1 3/3 = 4 4/5