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Question

Mike wants to arrange 108 books on the shelves. If he keeps 9 books on one shelf, how many such shelves does he need?

A
12 shelves
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B
13 shelves
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C
14 shelves
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D
11 shelves
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Solution

The correct option is A 12 shelves
Let’s assume, to arrange 108 books Mike needs a number of shelves.
To calculate the number of shelves required, we use the following division equation.
a=108÷9
a= Total number of books ÷ Number of books on a shelf
=108÷9
Let’s use the area model method for this division by splitting the number 108 as 90+18.

a=108÷9=12
Therefore, Mike needs 12 shelves.

Hence, option B is correct.

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