ж) (15 1/2 - 2 3/8) - (5 5/6 + 6 3/4)

(15 4/8 - 2 3/8) - (5 10/12 + 6 9/12) = 13 1/8 - 11 19/12 = 13 3/24 - 11 38/24 = 12 27/24 - 11 38/24 = 1 27/24 = 1 9/8 = 17/8