a) 6/13 + 7/13 = (6 + 7)/13 = 13/13 = 1
б) 2 11/15 - 8/15 = 2 + 11/15 - 8/15 = 2 + (11-8)/15 = 2 + 3/15 = 2 + 1/5 = 2 1/5
в) 4 7/24 + 6 5/24 = 4 + 7/24 + 6 + 5/24 = 10 + 12/24 = 10 + 1/2 = 10 1/2
г) 6 19/36 - 2 1/36 = 6 - 2 + 19/36 - 1/36 = 4 + 18/36 = 4 + 1/2 = 4 1/2
a) 6/13 + 7/13 = (6 + 7)/13 = 13/13 = 1
б) 2 11/15 - 8/15 = 2 + 11/15 - 8/15 = 2 + (11-8)/15 = 2 + 3/15 = 2 + 1/5 = 2 1/5
в) 4 7/24 + 6 5/24 = 4 + 7/24 + 6 + 5/24 = 10 + 12/24 = 10 + 1/2 = 10 1/2
г) 6 19/36 - 2 1/36 = 6 - 2 + 19/36 - 1/36 = 4 + 18/36 = 4 + 1/2 = 4 1/2