The library bought 340 science and technology books and literature and art books, 1% of the number of literature and art books Three is four times the number of science and technology books 5. How many copies of the two kinds of books?

The library bought 340 science and technology books and literature and art books, 1% of the number of literature and art books Three is four times the number of science and technology books 5. How many copies of the two kinds of books?

340÷（1+1
3÷4
5），
=340÷（1+5
12），
=340×12
17，
=240 (copies),
340-240 = 100
A: 240 literature and art books and 100 science and technology books

Huacun Bookstore sold books in April, with 40% of literature and art books, 35% of science and technology books, and 25% of comic books. It is known that 700 sci-tech books were sold this month. What kind of books sold the best this month? How many comic books were sold in total? If an average of 2 yuan can be earned for each book sold, how much money did you make from selling cultural books this month?

700 / 0.35 = 2000, 2000x25% = 500 comic books, 2000x40% x2 = 1600 yuan

A bookstore sells five times as many literature and art books as science and technology books, and 240 more than science and technology books. How many scientific and technological books are sold

Design and sale of X science and technology books
Then 5x-x = 240
X=60
Answer: sell science and technology book 60

Xinhua Bookstore story books are a quarter more than science and technology books, so science and technology books are less than story books by several percent

Take science and technology book as unit 1, story book is: 1 + 1 / 4 = 5 / 4
Less science books than story books: 1 / 4 △ 5 / 4 = 0.2 = 20%

There are 192 literature and art books, science and technology books and story books in the book corner of class 6 (1). The number of science and technology books known is one third of story books, It's a quarter of literature and art books. How many books are there in each of the three categories?

1+1÷1/3+1÷1/4=8
Number of science and technology books = 192 △ 8 = 24 (copies)
Number of story books = 24 △ 1 / 3 = 72 (copies)
Number of literary and artistic books = 24 △ 1 / 4 = 96 (copies)

There are 3 / 5 Science and technology story books, which account for 3 / 4 of all science and technology books How many books are there in the book corner? It's due tomorrow!

Story books account for 2.5, literature and art books account for (3.4 + 1) * 4 = 4.7, 20 (4.7-2.5) = 20 (6-35) = 24.7

Xinhua bookstore has approved books, 70 story books and comic books, 82 comic books and sci-tech books, 76 sci-tech books and story books. How many books are there?

There are 32 story books, 38 comic books and 44 science and technology books

Xiaoming bought a dictionary and a composition selection in the bookstore. The price of the composition selection was 1.5 yuan cheaper than that of the dictionary. The money for the composition selection accounted for the total amount of the book Three seventh. What's the price of the dictionary?

1.5÷（1-3/7-3/7）×（1-3/7）
=10.5×4/7
=6 yuan

Xiao Ming bought a dictionary and a composition selection. The dictionary is 1.6 yuan more expensive than the composition selection. The price ratio of composition selection to dictionary is 5:7. How much is each dictionary? fast

(1) 5-7 = 2 (2) 1.6 / 2 = 0.8 (yuan) (3) 0.8 * 7 = 5.6 (yuan)

Xiaohua bought a dictionary and a composition selection in the bookstore. It is known that the dictionary is 6 yuan more expensive than the composition selection. The price of the composition selection is 2 / 5 of the price of the dictionary. How much is the dictionary Count

The price of dictionary is 6 × 1 × (1-2 / 5) = 10 yuan;
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