Xiaoqiang has 36 story books. There are 17 more comic books than story books. How many comic books does Xiaoqiang have

36 + 17 = 53

There are 36 story books. There are 4 science books twice as many as story books. Comic books are twice as many as science books. How many science books are there

Seventy-six

There are two science and technology stories, and six of them are Xiaoming books

6 divided by 2 / 3 divided by 1 / 2 = 18 copies

Ding Ding was reading a story book. On the first day, he read one sixth of the whole book, and the next day he read 30 pages, one fifth of the whole book. How many pages did he read on the first day?

Set up x pages of the book
1/5x=30
x=30÷1/5
x=150
The first day I read 150x1 / 6 = 25 pages
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Ding Ding read a story book, the first day read 20 pages, the second day read the remaining 40%, this is not read and read the number of pages equal, this story book total How many pages? How many pages

First use 40% to remove (1-40%) / 50%, to get the next day to read 40% of the book is how much
40%÷[(1-40%)÷50%]=1/3
So the first day of reading 20 pages is 1-1 / 3-1 / 2 of the book
20÷(1-1/3-1/2)
=20÷1/6
=120 pages

The number of story books is five of the comic books 12． (1) The ratio of the number of comic books to the number of story books is () ( )． (2) The ratio of the number of story books to the total number of these two books is () ( )．

12：5=12
5；
5：（5+12）=5
17；
So the answer is: 12
5、5
17．

The number of story books in the library is three times less than the number of comic books. There are 100 story books and several comic books

Comics = (100 + 5) △ 3 = 35 copies

There are 50 comic books and story books in the small book corner. The number of story books is 3 times more than that of comic books. How many comic books and story books are there?

There are (50-2) / (3 + 1) = 12 comic books
There are 50-12 = 38 story books

Mother's age is 4 times that of Xiaohong, and her mother is 27 years older than Xiaohong. How old are you and Xiaohong! I haven't learned anything about X

Idea: mother's age is 4 times of Xiaohong's, that is, her mother's age is 3 times more than Xiaohong's;
Her mother is 27 years older than Xiaohong, that is, her mother is three times as much as Xiaohong and 27 times as much
One time of age can be calculated, that is, the age of daughter: 27 △ 3 = 9 years old
Mother's age: 9 × 4 = 36 years old
Comprehensive formula: 27 × (4-1) = 9 (years old) 9 × 4 = 36 (years old)

Two comic books for 1 yuan, one story book for 2 yuan, 60 books for 60 yuan, how many comic books and story books do you buy

Let's buy x comic books and Y story books, and formulate equations according to conditions
0.5x+2y=60
x+y=60
The solution is x = 40, y = 20

Xiaoqiang has 36 story books. There are 17 more comic books than story books. How many comic books does Xiaoqiang have