а) 70 / (3 + 4) = 70 / 7 = 10б) 70 / (1/7) / (6/7) = 70 (7/1) / (7/6) = 70 7 * 6 = 420в) 70 / (9 + 4 + 2) = 70 / 15 = 4.67
а) 70 / (3 + 4) = 70 / 7 = 10
б) 70 / (1/7) / (6/7) = 70 (7/1) / (7/6) = 70 7 * 6 = 420
в) 70 / (9 + 4 + 2) = 70 / 15 = 4.67