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Надя разрезала несколько длинных лент на короткие ленточки .Всего она сделала 20 разрезов и получила 28 ленточек.Надя резала ленты только поперёк. Сколько длинных лент она разрезала?
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Предмет:
Математика -
Автор:
dennis94 - 6 лет назад
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Ответы 1
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При разрезании КАЖДОЙ ленты на части Надя получает коротких кусков ленты равное количеству разрезов +1.Поскольку она сделала 20 разрезов и получила 28 кусков, значит лент было 28-20=8 длинных лент было у НадиОтвет 8 лент
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Автор:
tank - 6 лет назад
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