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Math worksheet for finding the greatest common factor of pairs of numbers by listing their factors.

$A math worksheet titled "Greatest Common Factor Sheet 3A" with five problems asking students to find the GCF of pairs of numbers by listing their factors, including numbers like 22 and 44, 45 and 27, and 51 and 42. The worksheet includes spaces for writing factors and the final answer, with a note clarifying that GCF and GCD mean the same thing. A small cartoon lizard is in the bottom right corner.$

A math worksheet titled "Greatest Common Factor Sheet 3A" with five problems asking students to find the GCF of pairs of numbers by listing their factors, including numbers like 22 and 44, 45 and 27, and 51 and 42. The worksheet includes spaces for writing factors and the final answer, with a note clarifying that GCF and GCD mean the same thing. A small cartoon lizard is in the bottom right corner.

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1) Factors of 22: 1, 2, 11, 22
Factors of 44: 1, 2, 4, 11, 22, 44
The greatest common factor is 22.

2) Factors of 45: 1, 3, 5, 9, 15, 45
Factors of 27: 1, 3, 9, 27
The highest common factor is 9.

3) Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42
Factors of 35: 1, 5, 7, 35
The greatest common factor is 7.

4) Factors of 50: 1, 2, 5, 10, 25, 50
Factors of 21: 1, 3, 7, 21
The highest common factor is 1.

5) Factors of 51: 1, 3, 17, 51
Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42
The greatest common divisor is 3.

Parent Tip: Review the logic above to help your child master the concept of math greatest common factor worksheet.

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