А) 2 целых 7/9 · 15 = 25/9 · 15/1 = 375/9
б) 3 целых 1/3 · 3/5 = 10/3 · 3/5 = 30/15 = 2
в) 28 · 2 целых 3/4 = 28/1 · 11/4 = 308/4 = 154/2 = 77/1 = 77
г) 1 целая 3/5 · 2 целых 1/2 = 8/5 · 5/2 = 40/10 = 4/1 = 4
д) 3 целых 1/6 · 24 = 19/6 · 24/1 = 456/6 = 152/2 = 76/1 = 76
е) 7 целых 7/12 · 12/21 = 91/12 · 12/21 = 1092/252 = 546/126 = 182/42 = 91/21
ж) 121 · 4 целых 1/11 = 121/1 · 45/11 = 5445/11
з) 10 целых 1/4 · 1 целая 1/41 = 41/4 · 42/41 = 1772/164