а) 1/2 + 5/8 = 4/8 + 5/8 = 9/8
б) 5/7 - 3/14 = 10/14 - 3/14 = 7/14 = 1/2
в) 5/6 + 3/8 = 20/24 + 9/24 = 29/24
г) 5/42 + 10/63 = 5/42 + 10/63 = 15/126 + 20/126 = 35/126
а) 1/2 + 5/8 = 4/8 + 5/8 = 9/8
б) 5/7 - 3/14 = 10/14 - 3/14 = 7/14 = 1/2
в) 5/6 + 3/8 = 20/24 + 9/24 = 29/24
г) 5/42 + 10/63 = 5/42 + 10/63 = 15/126 + 20/126 = 35/126