- 9/14 + 5/14 = - 4/14 = - 2/7
- 11/24 + 5/12 = - 11/24 + 10/24 = - 1/24
- 6/7 + 7/8 = - 48/56 + 49/56 = 1/56
- 1/27 + 13/36 = - 4/108 + 39/108 = 35/108
3/4 + (- 4/5) = 15/20 - 16/20 = - 1/20
2/24 + (- 11/36) = 6/72 - 22/72 = - 16/72 = - 2/9
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- 9/14 + 5/14 = - 4/14 = - 2/7
- 11/24 + 5/12 = - 11/24 + 10/24 = - 1/24
- 6/7 + 7/8 = - 48/56 + 49/56 = 1/56
- 1/27 + 13/36 = - 4/108 + 39/108 = 35/108
3/4 + (- 4/5) = 15/20 - 16/20 = - 1/20
2/24 + (- 11/36) = 6/72 - 22/72 = - 16/72 = - 2/9