Предмет: Математика, автор: алуа30

как отрезать от ленты длиной 1м 20 см кусок длиной 45 см, не позуясь линейкой.
помогите пж ☝

Ответы

Автор ответа: Слaва

0

Всего у нас 120 см
Делим пополам 60 и 60
Одну половинку делим пополам 30 и 30
Делим еще раз 15 и 15

берем вторую половинку длиной 60см прикладываем к ней кусочек 15 см
отрываем эти 15 см остается лента длиной 45 см

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