1 4/9 + 7 7/18 = 1 8/18 + 7 7/18 = 8 15/18
8 5/6 + 2 3/8 = 8 20/24 + 2 9/24 = 10 29/24 == 11 5/24
8 4/5 + 1 1/3 = 8 12/15 + 1 5/15 = 9 17/15 = 10 3/15 = 10 1/5
12 5/6 + 4/15 = 12 25/30 + 8/30 = 12 33/30 = 13 3/30 = 13 1/10 = 13,1
2 3/4 + 1 2/3 = 2 9/12 + 1 8/12 = 3 17/12 = 4 5/12
7/20 + 8 3/4 = 7/20 + 8 15/20 = 8 22/20 = 9 2/20 = 9 1/10 = 9,1
6 2/3 + 8 5/7 = 6 14/21 + 8 15/21 = 14 29/21 = 15 8/21