Предмет: Математика, автор: matveyeva02

Как решить задачу: с кондитерской фабрики отгрузили 20 коробок мармелада по 1,3 кг в коробке и 30 коробок по 1,1 кг мармелада. Сколько весит в среднем одна коробка

Ответы

Автор ответа: forral83
0
среднее находится как сумма всех членов, деленная на количество членов. у нас два вида коробок: по 1.3 кг и по 1.1 кг значит 1.3+1.1/2=1.2 1.2 кг в среднем весит коробка
Автор ответа: gorelov99
0
20x1,3=26(кг)-вес мармелада в 20 коробках .
30x1,1=33(кг)-вес мармелада в 30 коробках
20+30=50(шт)-всех коробок
26+33=59(кг)-вес всего мармелада
50/59=0,85(кг)-вес одной коробки
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