Ответ:18 − 9 + 5 − 6 = 9 + 5 − 6 = 14 − 6 = 8.7 + 6 − 4 + 2 = 13 − 4 + 2 = 9 + 2 = 11.50 + (46 − 30) = 50 + 16 = 66.7 + (15 − 9) · 8 = 7 + 6 · 8 = 7 + 48 = 55.