ученики помогали школьной библиотеке переплетать книги в первый день они переплели 2

ученики помогали школьной библиотеке переплетать книги в первый день они переплели 2 седьмых всех книг во второй день одну третью книг а в третий день остальные 40 книг Сколько всего книг переплели ученики за 3 дня
- Предмет:
  Математика
- Автор:
  billynqaz
- 6 лет назад

Ответы 4

сорри
- Автор:
  harley5
- 6 лет назад
- 0
нечаяно
- Автор:
  dinosaurhrqj
- 6 лет назад
- 0
извинни
- Автор:
  ariaskinner
- 6 лет назад
- 0
2/7+1/3=6/21+7/21=13/21 книг переплели за 2 дня 1-13/21=21/21-13/21=8/21 книг переплели в 3 день 40÷8×21=105 книг переплели за 3 дня
- Автор:
  archer
- 6 лет назад
- 0
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