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Grade Level Estimation: 1st
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Common core standards listing. [x] close
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A collection of math worksheets on finding factors, greatest common factors, and factor trees, as well as prime numbers & composite numbers.
To see Common Core Standards for these worksheets, click on the apple core symbol ().
FactorsFinding Factors Free
List the factors for the given numbers
Factor TreesFactor Trees #1 Member
Find the prime factorization by completing the basic factor treesFactor Trees #2 Member
More basic factor trees for teaching prime factorizationFactor Trees #3 Member
Complete these factor trees (different style) to reduce a number into its prime factors.Factor Trees #4 Member
More factor trees for prime factorization.
Prime NumbersPrime & Composite Numbers Member
Introduction to finding prime and composite numbersPrime & Composite Numbers 2 Member
Practice identifying prime and composite numbers.Prime & Composite Table Free
Complete the prime-composite number table.Prime Number Mouse Trail Member
Color the prime numbers to help the mouse find the cheese.Prime & Composite Coloring Chart Member
Color the prime numbers red and the composite numbers blue.Prime & Composite Questions Member
Complete the page of short-answer questions about prime and composite numbers.
Greatest Common Factor (GCF)Greatest Common Factor Free
Step-by-step introduction for finding the GCF of number pairsFind the GCF Member
Find the GCF of each pair of numbers.
Proper Factors and
List the perfect factors of the given numbers. Perfect factors are factors of a number, excluding the number itself.Proper Factors & Perfect Numbers Member
List the perfect factors of the given numbers. Then determine which number is a perfect number. (A perfect number is a number whose proper factors add up to the number itself.)
See Also:Fraction Worksheets (Advanced)
Simplifying fractions, equivalent fractions, and more.Adding Fractions
Add fractions with the same and different denominatorsMultiplication Worksheets
Practice basic multiplication skills with these printable worksheets and gamesLeast Common Multiple (LCM) Worksheets
Worksheets in which students determine the least common multiple, or LCM, for each number set