Ответ: 16 - 9 + 8 = 7 + 8 = 15 17 - 9 + 5 = 8 + 5 = 13 18 - (12 - 4) = 18 - 8 = 10 12 - (3 + 9) = 12 - 12 = 0 18 - 9 + 5 = 9 + 5 = 14 15 - 7 + 8 = 8 + 8 = 16