Ответ:42 + 18 − 40 = 60 − 40 = 20.18 + 26 + 16 = 44 + 16 = 60.80 − 34 + 16 = 46 + 16 = 62.53 + 37 − 66 = 90 − 66 = 24.48 − 37 + 79 = 11 + 79 = 90.54 + 17 + 19 = 71 + 19 = 90.42 − 26 + 50 = 16 + 50 = 66.42 + 48 − 16 = 90 − 16 = 74.