А) 1/2 = 4/8, 6/8 > 4/8 б) 1/2 = 3/6, 3/6 = 3/6 в) 1/2 = 6/12, 3/12 < 6/12 г) 1/2 = 9/18, 9/18 = 9/18 д) 1/2 = 5/10, 7/10 > 5/10 3/12 меньше 1/2