15/7 + 6/7 = 1 14/25+ 13/25= kak eto reshat obyasnite pojaluista подробно

1 5/7 + 6/7 = 1 + (5/7 + 6/7) = 1 + 11/7 = 1 + 7/7 + 4/7 = 1 + 1 + 4/7 = 2 целых 4/7

1 14/25 + 13/25 = 1 + (14/25 + 13/25) = 1 + 27/25 = 1 + 25/25 + 2/25 = 1 + 1 + 2/25 = 2 целых 2/25