5/9 + 13/27 = 15/27 + 13/27 = 28/27 = 1 целая 1/27
5/12 - 13/72 = 30/72 - 13/72 = 17/72
5/12 + 1/60 = 25/60 + 1/60 = 26/60 = 13/30
9/10 + 4/15 = 27/30 + 8/30 = 35/30 = 7/6 = 1 целая 1/6
5/9 + 13/27 = 15/27 + 13/27 = 28/27 = 1 целая 1/27
5/12 - 13/72 = 30/72 - 13/72 = 17/72
5/12 + 1/60 = 25/60 + 1/60 = 26/60 = 13/30
9/10 + 4/15 = 27/30 + 8/30 = 35/30 = 7/6 = 1 целая 1/6