4 8/11 + 5 7/11 = 9 15/11 = 10 4/11
7 5/9 + 2 8/9 = 9 13/9 = 10 4/9
7 - 3/8 = 6 8/8 - 3/8 = 6 5/8
10 - 3 7/15 = 9 15/15 - 3 7/15 = 6 8/15
4 8/11 + 5 7/11 = 9 15/11 = 10 4/11
7 5/9 + 2 8/9 = 9 13/9 = 10 4/9
7 - 3/8 = 6 8/8 - 3/8 = 6 5/8
10 - 3 7/15 = 9 15/15 - 3 7/15 = 6 8/15