Ответ:11 − 2 + 8 = 9 + 8 = 17.15 − 9 + 7 = 6 + 7 = 13.13 − 1 + 7 = 12 + 7 = 19.0 + 80 + 2 = 82.10 − 0 + 9 = 10 + 9 = 19.80 + 0 + 3 = 83.