В первом классе участь 160 учебников, что составляет 25% всех учащихся начальных

В первом классе участь 160 учебников, что составляет 25% всех учащихся начальных классов.40% всех учащихся школы состовляет ученики нстарших классов. сколько учебников в школе
- Предмет:
  Математика
- Автор:
  newtescobar
- 6 лет назад

Ответы 1

Раз 160 - 25% начальных классов, то всего 160 / 0,25 = 160 * 4 = 640 учатся в начальных классах.Раз старших классов 60%, то остальных - то есть начальных классов - 40%. То есть 640 является 40% от всех учеников. Тогда всех учеников 640/0.4 = 640 / 4 * 10 = 1600.Ответ: 1600
- Автор:
  roxanne
- 6 лет назад
- 0
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