В) 6 3/16 - (2 3/8 + 3 5/12) = 6 3/16 - 2 3/8 - 3 5/12 = (48 + 9 - 18 - 20)/48 = 19/48
г) 8 1/12 - 3 4/15 - 1 7/30 = 3 + (60 + 5 - 16 - 14)/60 = 3 35/60 = 3 7/12
д) (13 - 8 5/12) + (17 1/2 - 16 1/5) = 4 7/12 + 1 3/10 = 5 + (35 + 18)/60 = 5 57/60
е) (63 2/3 + 3 1/8) - (13 - 10 5/9) = 66 19/24 - 2 4/5 = 64 + (95 - 96)/120 = 64 - 1/120 = 63 119/120