12 7/15 - 9 3/4 + 5 11/12
12 7/15 - 9 3/4 + 5 11/12 = (12 - 9 + 5) + (7/15 - 3/4 + 11/12) = 8 + (28/60 - 45/60 + 55/60) = 8 + 38/60 = 8 19/30
Решите задачу: