А) 3/5 + 2/15 = 9/15 + 2/15 = 11/15
Б) 3/7 + 2/3 = 9/21 + 14/21 = 23/21
В) 3/8 + 5/12 = 9/24 + 10/24 = 19/24
Г) 7/9 + 3/4 = 28/36 + 27/36 = 55/36
Д) 3/8 + 1/6 + 5/12 = 9/24 + 4/24 + 10/24 = 23/24
А) 3/5 + 2/15 = 9/15 + 2/15 = 11/15
Б) 3/7 + 2/3 = 9/21 + 14/21 = 23/21
В) 3/8 + 5/12 = 9/24 + 10/24 = 19/24
Г) 7/9 + 3/4 = 28/36 + 27/36 = 55/36
Д) 3/8 + 1/6 + 5/12 = 9/24 + 4/24 + 10/24 = 23/24