Предмет: Математика, автор: catt133727

Задание 31.15 б и в пример подробно решите пж

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Ответы

Автор ответа: ekaterinka565
0

Находим решение математическому выражению:

(28,8 / 13 5/7 + 6,6 / 2/3) / (1 11/16 / 2,25) = 16.

В первую очередь выполняем действия в скобках

- В первых:

1) Деление:

28,8 / 13 5/7 = 144/5 / 96/7 = 144/5 х 7/96 = (3 х 7)/(5 х 2) = 21/10;

6,6 / 2/3 = 33/5 / 2/3 = 33/5 х 3/2 = (33 х 3)/(5 х 2) = 99/10;

2) Сложение:

21/10 + 99/10 = 120/10 = 12;

- Во вторых:

1) Деление:

1 11/16 / 2,25 = 27/16 / 2,25 = 1,6875 / 2,25 = 0,75;

Выполняем деление:

12 / 0,75 = 16.

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пж помогите нужно сделать до завтра