Ответ:15 − 7 + 6 = 8 + 6 = 14.24 − 20 + 8 = 4 + 8 = 12.30 + 40 − 20 = 70 − 20 = 50.13 − 3 + 4 = 10 + 4 = 14.7 + 10 − 10 = 17 − 10 = 7.60 + 0 − 60 = 60 − 60 = 0.