Ответ:7 + 9 − 8 = 16 − 8 = 8.10 + 6 − 9 = 16 − 9 = 7.18 − 10 + 6 = 8 + 6 = 14.17 − (6 + 4) = 17 − 10 = 7.5 + (14 − 7) = 5 + 7 = 12.9 + (16 − 8) = 9 + 8 = 17.