Math problem storybooks are a quarter more than science and technology books. What do you think of as unit 1? What percentage of science and technology books are storybooks

Regard scientific and technological books as unit 1
Science book is 1, story book is 1 + 1 / 4 = 5 / 4
So science and technology books are 1 / (5 / 4) = 4 / 5 of storybooks

Xinhua Bookstore sold 1440 children's story books, science and technology books and literature and art books in August. Literature and art books accounted for 25%, and science and technology books accounted for 10% more than literature and art books
How many books were sold in August? What percentage more children's story books were sold than literature books?

The following is the result of literal understanding: literature and art books = 1440 * 0.25 = 360 science and technology books = 360 * 1.1 = 396 children's books = 1440-360-396 = 684 children's books are more than literature and art books (684-360

5. Hemingway, an American writer, won the Nobel Prize for literature in 1954
5. Revise the wrong sentence. (3 points) (1 wrong sentence, 1 wrong word, 1 other word.)
Hemingway, an American writer, won the Nobel Prize for literature in 1954. He has a habit of standing and writing on one leg. He explained himself: "I take this posture to write, so that I am in a state of tension, forcing myself to express my thoughts concisely and concisely as far as possible."

The wrong sentence: "force yourself to express your thoughts as succinctly as possible" is changed to "force yourself to express your thoughts as succinctly as possible"
Wrong word: "get" to "get"
Another word: "refining" is changed to "refining" ("refining" refers to refining, special processing, "refining" refers to writing concise and clear articles)

[1 + (1 / 2002) + (1 / 2004) + (1 / 2006)] * [(1 / 2002) + (1 / 2004) + (1 / 2006) + (1 / 2008)] * [(1 / 2002) + (1 / 2004) + (1 / 2006)]
50 points
Make it clear
I added 100 points

In this paper, we set (1 / 2002) + (1 / 2004) + (1 / 2006) as a, and then simplify it

Simple calculation of 10.75 10.4-9.86

10+0.75+0.4-10+0.14＝1.15+0.14＝1.29

Xiao Ming does 12 math problems, and the proportion of the number of problems he has done and the number of problems he has not done is ()
also
The side area of the cylinder is constant, () is inversely proportional to the height

Perimeter of bottom surface
The side area is equal to the perimeter of the bottom multiplied by the height

17. Arrange the positive and odd numbers in three columns as follows: 1 3 5 7 9 11 13 15 17 Then 2009 in line, column
1 3 5
7 9 11
13 15 17

335 rows and 3 columns

Xiao Ming and Xiao Liang played the game of stone scissors and paper for a long time, but it was no fun. So Xiao Liang suggested that if he lost, he would be beaten once, and if he won, he would be beaten twice,
If the two are the same, he will hit Xiaoming three times
Is the game fair

Method 1: list all the situations, Xiao Ming out; Xiao Liang out; Xiao Ming is beaten; Xiao Liang is beaten stone stone 3; 0 stone scissors 0; 1 stone cloth 0; 2 scissors stone

In a 15 decimeter long, 12 decimeter wide and 14 decimeter high cuboid water tank, there is 10 decimeter deep water. If a 30 cm long cube iron block is sunk in the water, the water does not overflow. Then how many decimeters is the water depth in the water tank?

30cm = 3DM, height of rising water: (3 × 3 × 3) △ 15 × 12) = 27 △ 180 = 0.15 (DM) 0.15dm + 10dm = 10.15 (DM). A: then the water depth in the water tank is 10.15m

Calculation: 2 + 6 + 10 + 14 + 18 + 22

2+6+10+14+18+22
=（2+22）×3
=24×3
=72

Math problem storybooks are a quarter more than science and technology books. What do you think of as unit 1? What percentage of science and technology books are storybooks