(1 2/9+1 1/6)*(2-1 25/42
(1 2/9+1 1/6)*(2-1 25/42) 1) 1 2/9 + 1 1/6 = 2 7/18 2) 2 - 1 25/42 = 17/42 3) 2 7/18 * 17/42 = 1 62/63 Ответ: 1 62/63