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 A12 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.