1/6 + 1/9 = 3/18+2/18 = 5/18
2/9 + 5/6 = 4/18+15/18 = 19/18 = 1 1/18
2/9 + 3/8 = 16/72 + 27/72 = 43/ 72
2/10 + 6/15 = 6/30 + 30/30 = 18/30 = 6/10
3/10 + 2/12 = 18/60 + 10/60 = 28/60 = 7/15
5/12 + 4/15 = 25/60 + 16/60 = 41/60
3/4 + 5/18 = 27/36 + 10/36 = 37/36 = 1 1/36
2/26 + 3/39 = 6/78 + 6/78 = 12/78 = 2/13
7/34 + 5/51 = 21/102 + 10/102 = 31/102
4/210 + 5/140 = 8/420 + 15/420 = 23/420
7/450 +8/180 = 14/900 + 40/900 = 54/900 = 3/50
9/180 + 7/120 = 18/360 + 14/360 = 32/360 = 4/45