А) 3 + 8 5/12 = 11 5/12
б) 10 6/7 - 3 = 7 6/7
в) 4 2/13 + 5 7/13 = 9 9/13
г) 8 7/12 - 4 2/12 = 4 5/12
д) 4 8/11 + 5 7/11 = 9 15/11 = 9+1 4/11 = 10 4/11
е) 7 5/9 - 2 8/9 = 6 14/9 - 2 8/9 = 4 6/9
ж) 7 - 3/8 = 6 8/8 - 3/8 = 6 5/8
з) 10 - 3 7/15 = 9 15/15 - 3 7/15 = 6 8/15