4/7 + 3/14 = 8/14 + 3/14 = 11/143/22 + 6/11 = 6/22 + 12/22 = 18/22 = 9/111/2 + 3/8 = 4/8 + 3/8 = 7/85/6 + 5/24 = 20/24 + 5/24 = 25/244/7 - 8/21 = 12/21 - 8/21 = 4/217/10 - 9/100 = 70/100 - 9/100 = 61/10017/18 - 5/6 = 17/18 - 15/18 = 2/18 = 1/91/2 - 2/5 = 5/10 - 4/10 = 1/103/4 + 2/3 = 9/12 + 8/12 = 17/123/5 + 1/3 = 9/15 + 5/15 = 14/15
4/7 + 3/14 = 8/14 + 3/14 = 11/14
3/22 + 6/11 = 6/22 + 12/22 = 18/22 = 9/11
1/2 + 3/8 = 4/8 + 3/8 = 7/8
5/6 + 5/24 = 20/24 + 5/24 = 25/24
4/7 - 8/21 = 12/21 - 8/21 = 4/21
7/10 - 9/100 = 70/100 - 9/100 = 61/100
17/18 - 5/6 = 17/18 - 15/18 = 2/18 = 1/9
1/2 - 2/5 = 5/10 - 4/10 = 1/10
3/4 + 2/3 = 9/12 + 8/12 = 17/12
3/5 + 1/3 = 9/15 + 5/15 = 14/15