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A factor is a whole number that divides exactly into a larger number without leaving a remainder. To factor a number, identify all of its prime factors by breaking the number down into its factors until all of the factors are prime.

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Prime Factors Worksheets

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Basic Lesson
Demonstrates how to find the prime factors of a number. Also includes practice problems.
Standard: MATH 1
Grades: (3-5)
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Intermediate Lesson
Uses a larger more difficult numbers than the basic lesson.
Standard: MATH 1
Grades: (3-5)
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Independent Practice 1
Find all the prime factors of each number. The answers can be found below.
Standard: MATH 1
Grades: (3-5)
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Independent Practice 2
20 practice problems that review prime factors. The answers can be found below.
Standard: MATH 1
Grades: (3-5)
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Prime Factors Homework
12 problems to reinforce the lessons and practice pages. An example is provided.
Standard: MATH 1
Grades: (3-5)
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Prime Factors Quiz
10 problems that test prime factoring skills.
Standard: MATH 1
Grades: (3-5)
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Answer Keys
Answers for the homework and quiz.
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Answer Keys
Answers for both lessons and both practice sheets.
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