Ответ:7 · 4 = 28.3 · 9 = 27.2 · 3 = 6.24 : 6 = 4.21 : 7 = 3.27 : 9 = 3.81 − 40 + 9 = 41 + 9 = 50.56 + 30 − 7 = 86 − 7 = 79.67 − 7 − 4 = 60 − 4 = 56.51 − 15 : 5 = 51 − 3 = 48.51 − 21 : 3 = 51 − 7 = 44.51 − 24 : 4 = 51 − 6 = 45.