1) 3/7 - 2/7 = 1/72) 1/9 + 5/9 = 6/9 = 2/33) 3/20 + 7/20 = 10/20 = 1/24) 11/51 + 13/51 = 24/51 = 8/175) 32/55 + 23/55 = 55/55 = 16) 13/48 - 11/48 = 2/48 = 1/24
1) 3/7 - 2/7 = 1/7
2) 1/9 + 5/9 = 6/9 = 2/3
3) 3/20 + 7/20 = 10/20 = 1/2
4) 11/51 + 13/51 = 24/51 = 8/17
5) 32/55 + 23/55 = 55/55 = 1
6) 13/48 - 11/48 = 2/48 = 1/24