Factor Tree Fun
A Grade 5 math worksheet focusing on factor trees to find prime factorization.
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Factor Tree Fun
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A factor tree helps us find the prime factors of a number. Break down each number into its factors until all branches end in prime numbers. Remember, a prime number is a whole number greater than 1 that has only two factors: 1 and itself.
1. Complete the factor tree for the number 24. Write the prime factorization in the blank space.
Prime factorization of 24:
2. Complete the factor tree for the number 36. Write the prime factorization in the blank space.
Prime factorization of 36:
Identify the prime factors for each number using a factor tree in your head or on scratch paper.
3. The prime factors of 18 are .
4. The prime factors of 40 are .
5. The prime factors of 50 are .
6. Which of the following is the prime factorization of 60?
2 x 2 x 3 x 5
2 x 3 x 10
6 x 10
3 x 4 x 5
7. What are the prime factors of 72?
2, 3, 4, 6
2, 3
2, 2, 2, 3, 3
8, 9
Read each statement and circle True or False.
8. The number 1 is a prime factor.
True
False
9. Every composite number can be written as a product of prime factors.
True
False
10. Draw a factor tree for the number 48 in the space below. Then write its prime factorization.
Prime factorization of 48:
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