1/2 + 1/3 + 1/5 = 15/30 + 10/30 + 6/30 = 31/30
1/2 + 1/5 + 3/7 = 15/30 + 6/30 + 90/30 = 111/30
1/2 + 2/3 + 3/5 = 15/30 + 20/30 + 18/30 = 53/30
2/3 + 1/4 + 1/5 = 40/60 + 15/60 + 12/60 = 67/60
Таким образом, суммы равны31/30, 111/30, 53/30, 67/60.
1/2 + 1/3 + 1/5 = 15/30 + 10/30 + 6/30 = 31/30
1/2 + 1/5 + 3/7 = 15/30 + 6/30 + 90/30 = 111/30
1/2 + 2/3 + 3/5 = 15/30 + 20/30 + 18/30 = 53/30
2/3 + 1/4 + 1/5 = 40/60 + 15/60 + 12/60 = 67/60
Таким образом, суммы равны
31/30, 111/30, 53/30, 67/60.