Предмет: Другие предметы, автор: Alikhan2004amanbaev

Пятеро друзей обменялись между собой фотографиями.Сколько всего было роздано фотографий?Ответ поясни.

Ответы

Автор ответа: kris1236

20
один дал второму третьему четвёртому пятому
второй дал первому третьему и четвёртому пятому
третий дал первому второму и четвёртому пятому
четвёртый дал первому второму третьему пятому
пятый дао первому второму третьеу и четвёртому
далее умножаем 4 фотографии на 5 человек = 20 фотографий
всё просто.

Alikhan2004amanbaev: спс

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