а) 57:8 + 15:8 = (72 + 15):8 = 87:8 = 10.875б) 81:10 + 19:10 = (100 + 19):10 = 119:10 = 11.9в) 124:17 + 46:17 = (170 + 46):17 = 216:17 = 12
а) 57:8 + 15:8 = (72 + 15):8 = 87:8 = 10.875
б) 81:10 + 19:10 = (100 + 19):10 = 119:10 = 11.9
в) 124:17 + 46:17 = (170 + 46):17 = 216:17 = 12