Предмет: Алгебра, автор: KirillErykalov

На счету Наташиного мобильного телефона было 77 рублей, а после разговора с Игорем осталось 12 рублей. Сколько минут длился разговор с Игорем, если одна минута разговора стоит 2 рубля 50 копеек. Помогите решить!!!))

Ответы

Автор ответа: volkonskayaa
4

Сначала находим количество денег,потраченных на раговор 77-12=65 

мы знаем ,что одна минута стои\т 2 рубля пятьдесят копеек, теперь ,чтобы найти количество минут разговора нужно 65 рублей : 2,5=26 минут она разговаривала и Игорем

ОТВЕТ 26 минут длился раговор

Автор ответа: зайка18
8

77-12=65 (руб.) - проговорили

65:2,5=26 минут - она разговаривала с Игорем

 

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