а) 7/16 + 1/4 = 7/16 + 4/16 = 11/16
б) 25/36 - 2/9 = 25/36 - 8/36 = 17/36
в) 7/12 - 5/24 = 14/24 - 5/24 = 9/24 = 3/8
а) 7/16 + 1/4 = 7/16 + 4/16 = 11/16
б) 25/36 - 2/9 = 25/36 - 8/36 = 17/36
в) 7/12 - 5/24 = 14/24 - 5/24 = 9/24 = 3/8