А) 11/48 + 13/48 + 17/48 = 41/48
б) 19/55 + 18/55 + 12/55 = 49/55
в) 25/64 + 17/64 + 15/64 = 57/64
г) 23/69 + 38/69 + 7/69 = 68/69
д) 28/43 + 52/43 + 19/43 = 99/43 = 2 13/43
е) 17/45 + 11/45 + 23/45 = 51/45 = 1 2/15
ж) 1/45 + 2/45 + 7/45 = 10/45 = 2/9
з) 13/44 + 15/44 + 17/44 = 45/44 = 1 1/44
и) 16/77 + 8/77 + 4/77 = 28/77 = 4/11