Question

Ученики помогали школьной библиотеке переплетать книги. В первый день они переплели 2/7 всех книг ,во второй день - 1/3 всех книг, а в третий день - остальные 40 книг. Сколько всего книг переплели ученики за три дня?

Answer 1

40=х*(1-1/3-2/7)
40=х*(21/21-7/21-6/21)
21*40/8=х
х=105
Ответ:105

Answer 2

Calculation of the Total Number of Books Bound by Students in Three Days

To calculate the total number of books bound by the students in three days, we need to add up the number of books bound each day.

On the first day, the students bound 2/7 of all the books. On the second day, they bound 1/3 of the remaining books. On the third day, they bound the remaining 40 books.

Let's calculate the total number of books bound by the students:

1. First day: 2/7 of all the books 2. Second day: 1/3 of the remaining books after the first day 3. Third day: the remaining 40 books

To calculate the total number of books bound, we can follow these steps:

1. Calculate the number of books bound on the first day: - Multiply the fraction 2/7 by the total number of books. - Let's assume