а) 20:4 = 5, 20 1/2 = 10б) 30:4 = 7.5, 30 1/2 = 15в) 40:4 = 10, 40 1/2 = 20г) 50:4 = 12.5, 50 1/2 = 25
а) 20:4 = 5, 20 1/2 = 10
б) 30:4 = 7.5, 30 1/2 = 15
в) 40:4 = 10, 40 1/2 = 20
г) 50:4 = 12.5, 50 1/2 = 25