Ответ:5 + 8 − 9 = 13 − 9 = 4.10 + 5 − 6 = 15 − 6 = 9.19 − 10 + 7 = 9 + 7 = 16.14 − (2 + 5) = 14 − 7 = 7.4 + (16 − 8) = 4 + 8 = 12.9 + (18 − 9) = 9 + 9 = 18.