1. б) Вычислите: -2 + (11/24 + 5/16) : (15/2 - 2/5)

-2 + (22/48 + 15/48) : (75/10 - 4/10) = -2 + (37/48) : (71/10) = -2 + (37/48) * (10/71) = -2 + 370/3408 = -2 + 185/1704 = (-3408 + 185) / 1704 = -3223/1704