(3 5/12+4 7/12)-5 2/9
(3 5/12 + 4 7/12) - 5 2/9 1)3 5/12 + 4 7/12 = 7 12/12 = 8 2) 8 - 5 2/9 = 2 7/9 Ответ:2 7/9