Math

posted by Nawaf

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?

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?

1. Steve

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.

90-72 = 18 History books
and so on for each subject

Then add up the results for all the books

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