Question

Помогите решить задачу по Алгебре!!!!! Прошу!!!!! В книге а страниц. Мальчик в первый день прочитал 20% всей книги, а во второй 2/3( это обыкновенная дробь) всей книги. Сколько страниц ему осталось прочитать. Срочно! Осень нужно!!!!! Пожалуйста!!!!!

Answer 1

20% книги = 0,2 а
а-0,2а-2/3а=а-1/5а-2/3а=а-3/15а-10/15а=2/15а

Ответ: осталось прочитать 2/15 книги

Answer 2

Problem Analysis

The problem states that a boy read 20% of a book on the first day and 2/3 of the book on the second day. We need to determine how many pages are left for him to read.

Solution

Let's assume the total number of pages in the book is 'a'.

On the first day, the boy read 20% of the book, which is 0.2a pages.

On the second day, he read 2/3 of the book, which is (2/3)a pages.

To find the number of pages left to read, we subtract the pages read from the total number of pages: Remaining pages = Total pages - Pages read

Let's calculate the remaining pages.

Calculation

Total pages in the book = 'a'

Pages read on the first day = 0.2a

Pages read on the second day = (2/3)a

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