Practice Dividing by 9
History : 72
Art: 81
Science: 54
Travel: 63
Fiction: 90
Biography: 45
Poetry: 27
Cooking: 36
1/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?
Answer:
3 types of books..
Explain:
History: 72 divide 9= 8
&
Science: 54 divide 9=6
&
Cooking: 36 divide 9= 4
2/How many books would Raul have to buy if he wanted to have 10 books on each self, no matter what the subject?
Answer: don't understand
10 books * 9 shelves = 90 books
He already has more than that.
Now, if he wanted 10 books for each subject on each shelf, then he'd need to have 90 books for each subject.
So, he'd need to buy
90-72 = 18 History books
and so on for each subject
Then add up the results for all the books
To answer the second question, we need to determine how many books Raul would need to have 10 books on each shelf, regardless of the subject.
First, we need to find out how many books are in total. Adding up the number of books in each subject, we get:
72 + 81 + 54 + 63 + 90 + 45 + 27 + 36 = 468 books
Next, we divide the total number of books by the desired number of books on each shelf (10):
468 / 10 = 46.8
Since we cannot have a fraction of a book, we need to round up to the nearest whole number. Therefore, Raul would need to buy 47 books in total to have 10 books on each shelf, regardless of the subject.