Предмет: Математика, автор: artelisvl

мальчик накопил на покупку фотоаппарата 52 тысячи 1 брат дал ему 25 % суммы собранной без него отец 50% суммы без него 2 брат дал 33 1/3 % суммы без него сколько стоил фотоаппарат

Ответы

Автор ответа: LN330068

Ответ:

1/3% переведём в десятичную дробь,это дробь с очень длинным хвостом,но мы ее сократим до двух знаков после запятой

1/3%=0,33%
Задачу можно решить двумя способами

1)Отдельно узнать,сколько денег дали мальчику отец и оба брата

Первый брат

52000. - 100%
Х. - 25%
Х=52000•25:100=13000

Отец

52000. - 100%
Х. - 50%
52000•50:100=26000

Второй брат

52000. - 100%
Х. - 33,33%
52000•33,33:100=17331,6

Фотоаппарат стоил

52000+13000+26000+17331,6=
108331,6

Второй вариант

Узнаём,сколько в % составляет помощь отца и двух братьев

25%+50%+33,33%=108,33%
52000. - 100%
Х. - 108,33%
Х=52000•108,33:100=56331,6

Фотоаппарат стоит

56331,6+52000=108331,6

Пошаговое объяснение:

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