Ответ:

11) 1 2/5 + 5/3 - 7/5 + 76/3 - 72/3 = 7/5 + 5/3 - 7/5 + 76/3 - 72/3 = (7/5 - 7/5) + (5/3 + 76/3 - 72/3) = 0 + (5 + 76 - 72)/3 = 9/3 = 3

Ответ: 3