Printable Greatest Common Factor Worksheets
Greatest common factor worksheets guide 4th and 5th grade students to find the highest shared factor of two numbers. These printable pages feature Venn diagrams, factor lists, and full answer keys.
Greatest Common Factor Practice Pack. Ready to Print.
Structured, printable skill sheets with step-by-step guidance for Greatest Common Factor.
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GCF by listing factors
Find GCF by listing factors
GCF by listing factors
Identify the greatest common factor
GCF by listing factors
GCF by listing factors (word problems)
GCF by prime factorization
Find GCF using factor trees
GCF by prime factorization
Find GCF from prime factorizations
GCF by prime factorization
GCF by prime factorization (word problems)
GCF of two numbers to 100
GCF of two numbers up to 100
GCF of two numbers to 100
Find GCF using venn diagrams
GCF of two numbers to 100
GCF of numbers up to 100 in context
GCF of two numbers to 500
GCF of two numbers to 500 (factor trees)
GCF of two numbers to 500
Choosing efficient GCF strategies (to 500)
GCF of two numbers to 500
GCF of numbers up to 500 (word problems)
GCF of three numbers
GCF of three numbers by listing factors
GCF of three numbers
Find GCF from prime factorizations
GCF of three numbers
GCF of three numbers (word problems)
About Greatest Common Factor
What this skill is
The Greatest Common Factor (GCF) is the largest whole number that divides evenly into two or more given numbers without a remainder, needed for simplifying fractions to lowest terms.
When children learn it
Introduced in 4th grade and formally mastered in 5th and 6th grade (CCSS 6.NS.B.4) for fraction reduction.
Teaching Tips
- Use a two-column list: write all factors of number A, write all factors of number B. Circle every number that appears in BOTH lists. Have your child point to the biggest circled number: that is the GCF!
Common Mistakes
- Selecting a shared common factor that is not the GREATEST one (such as choosing 2 instead of 6 for 12 and 18).
- Listing multiples instead of factors.
- Missing factors in one of the number lists.