Ответ:
a)18 5/6; б) 55 4/5; в)6 37/98; г) 14 23/48
Пошаговое объяснение:
а)11 5/12 + 7 5/12 = 18 10/12 = 18 5/6
б)54 1/3 + 1 7/15 = 54 1/3*5 + 1 7/15 = 54 5/15 + 1 7/15 = 55 12/15 = 55 4/5
в)6 5/14 + 1/49 = 6 5/14*7 + 1/49*2 = 6 35/98 + 2/98 = 6 37/98
г)9 7/16 + 5 1/24 = 9 7/16*3 + 5 1/24*2 = 9 21/48 + 5 2/48 = 14 23/48