Ответ:40 − 30 + 5 = 10 + 5 = 15.30 + 30 + 4 = 60 + 4 = 64.76 − 6 − 50 = 70 − 50 = 20.94 − 90 + 7 = 4 + 7 = 11.70 − 50 + 6 = 20 + 6 = 26.30 + 50 − 70 = 80 − 70 = 10.12 − 4 + 8 = 8 + 8 = 16.34 − 30 + 8 = 4 + 8 = 12.