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This printable supports Common Core Mathematics Standard 4.OA.B.4.

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# Finding Factor Pairs (Grade 4)

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## Finding Factor Pairs

Instructions: Factor pairs are two numbers that multiply together to equal a product. For example, in the equation 5 x 4 = 20, the factors are 5 and 4. 5 and 4 are a factor pair because they multiply together to equal 20.

The number 20 has two other factor pairs:
1 and 20 are a factor pair of 20 because 1 x 20 = 20.
2 and 10 are a factor pair of because 2 x 10 = 20.

Use your knowledge of factor pairs to answer the following questions.

1.
The number 81 has only the two factor pairs listed below.
1 and 81
9 and 9
1. True
2. False

2.
All of the factor pairs for the number 40 are listed below.
1 and 40
2 and 20
4 and 10
5 and 8
1. True
2. False
3.
Which of the following is a factor pair of 72?
1. 8 and 9
2. 12 and 7
3. 36 and 36
4. 9 and 7
5. None of the above

4.
Which of the following is NOT a factor pair of 24?
1. 6 and 4
2. 12 and 2
3. 8 and 4
4. 3 and 8
5. None of the above
5.
The American flag has 50 stars. Which shows a factor pair of the number 50? 1. 2 and 25
2. 10 and 40
3. 20 and 30
4. 100 and 150

6.
Select the TWO sets of factor pairs for the number of picnic tables shown.        1. 1 and 8
2. 3 and 5
3. 4 and 2
4. 8 and 16
5. 16 and 24
7.
Select the TWO choices that are factor pairs for the number 62.
1. 1 and 62
2. 2 and 31
3. 3 and 20
4. 4 and 16
5. 6 and 10

8.
How many factor pairs are there for the number 28?
1. 1
2. 2
3. 3
4. 4
9.
Select the THREE choices that are factor pairs for the number 36.
1. 1 and 36
2. 2 and 19
3. 3 and 12
4. 5 and 8
5. 7 and 6
6. 9 and 4

10.
Select the THREE choices that are factor pairs for the number 48.
1. 1 and 48
2. 2 and 26
3. 3 and 16
4. 4 and 14
5. 6 and 8
6. 9 and 7        You need to be a HelpTeaching.com member to access free printables.
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