Ответ:
Пошаговое объяснение:
538
a) 2 4/13 + 2/13 = 2 6/13
б) 2 4/13 + 1 2/13 = 3 6/3
в) 2 4/13 + 10/13 = 2 14/13 = 3 1/13
г) 2 4/13 + 1 10/13 = 3 14/13 = 4 1/13
539
а) 1 1/8 + 3/8 = 1 4/8 = 1 1/2
б) 1 1/8 + 2 3/8 = 3 4/8 = 3 1/2
в) 1 1/8 + 7/8 = 1 8/8 = 2
г) 1 1/8 + 2 7/8 = 3 8/8 = 4
540
а) 3 4/19 + 8/19 = 3 12/19
б) 3 4/19 + 2 8/19 = 5 12/19
в) 3 4/19 + 18/19 = 3 22/19 = 4 3/19
г) 4/19 + 2 18/19 = 2 22/19 = 3 3/19