Practice Dividing by 9

A Jeweler placed 20 necklaces on 5 different tables. He placed the same number of necklaces on each table . How many necklaces did the jeweler place on each?

Raul's book collection
Subject of book. Number of books

History. 72
Art. 81
Science. 54
Travel. 63
Fiction. 90
Biography. 45
Poetry. 27
Cooking. 36

1/Raul might place 9 history books on each shelf of one bookcase.how many shelves will be in that bookcase?

2/ Raul has 9 empty shelves to hold his cookbooks . If he puts the same number of cookbooks on each shelf, how many will be on each shelf?

3/Raul might put an equal number of each kind of book on 9 shelves. How many types of books will have an even number on each shelf?

4/Raul considered combibining two of the subjects and placing 9 books on each shelf. It would take 7 shelves to do this. What were the two subjects?

5/ Raul fills 9 shelves with his traves , history, and biography books. Each shelf has the same number of each kind of book. How many books are on each shelf?

6/ How many books would Raul have to buy if he wanted to have 10 books on each shelf, no matter what the subject?

Well since Raul has 6 shelfs and wanted to have 10 books on each shelf it would be 6 times 10 and i want to help you so 6*10 Equals 60 I Hope This Will Help You

To practice dividing by 9, we can solve the following problems:

1. The Jeweler placed 20 necklaces on 5 different tables. To find out how many necklaces the jeweler placed on each table, we need to divide the total number of necklaces (20) by the number of tables (5).
Solution: 20 ÷ 5 = 4
Therefore, the jeweler placed 4 necklaces on each table.

2. In Raul's book collection, we are given the number of books in various subjects.
Solution: To find the number of shelves for a specific subject, we divide the total number of books in that subject by 9 (since each shelf holds 9 books).
For example, to find the number of shelves needed for History books:
72 ÷ 9 = 8
Therefore, Raul will need 8 shelves for his History books.

3. Raul has 9 empty shelves for his cookbooks. To find the number of cookbooks on each shelf, we need to divide the total number of cookbooks by the number of shelves.
Solution: Since we are not given the total number of cookbooks, we cannot determine the exact number on each shelf.

4. Raul plans to put an equal number of each kind of book on 9 shelves. We need to determine how many types of books will have an even number on each shelf.
Solution: We need to find the number of types of books where the total number of books in that category is divisible by 9.
Looking at the given data, we can see that Fiction is the only category with a total number of books (90) divisible by 9.
Therefore, only the Fiction books will have an even number on each shelf.

5. Raul wants to fill 9 shelves with his travel, history, and biography books. To find out how many books are on each shelf, we need to divide the total number of books in each category by the number of shelves.
Solution: Adding the total number of books for the three categories: 63 + 72 + 45 = 180
Dividing by the number of shelves:
180 ÷ 9 = 20
Therefore, each shelf will have 20 books from the travel, history, and biography categories.

6. If Raul wants to have 10 books on each shelf, regardless of the subject, we need to determine the total number of books he would need to buy.
Solution: We add up the total number of books in each subject and divide by the desired number of books on each shelf.
Adding the total number of books in each subject: 72 + 81 + 54 + 63 + 90 + 45 + 27 + 36 = 468
Dividing by the desired number of books on each shelf:
468 ÷ 10 = 46.8
Since we cannot have a fractional number of books, we round up to the nearest whole number.
Therefore, Raul would need to buy at least 47 books.

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