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8 4/15 + 2 11/15=10 15/15=11

4 5/9+3 7/9=7 12/9=8 3/9

1 - 14/23 = 23/23 - 14/23 = 9/23

6-3 4/9=5 9/9-3 4/9=2 5/9

9 5/12-4 7/12=8 17/12- 7/12=4 10/12=4 5/6

4 11/36-5 25/36

=23 47/36 25/36=18 22/36=18 11/18