Deepen the number sense of young mathematicians by exploring the process of prime factorization. Follow along with this step-by-step presentation that explains how factor trees are used to break a composite number down into its prime factors. Consider taking time during the presentation for learners to share different approaches to factoring the numbers given in the examples. A great supplement for a lesson on prime factorization, either as part of whole class instruction or as an independent learning activity.

Concepts

composite numbers, factor trees, factoring, factoring numbers, factors, multiplication, prime numbers

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Additional Tags

prime number, factor, multiplication, factor tree, composite number, math

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Pros

• Multiple strategies are modeled for finding the factors of composite numbers
• The Test Yourself assessment includes a variety of questions related to prime factorization
• The presentation and Try It! practice problems are printable

Cons

• Prior to viewing the presentation, teacher must review the definitions of prime and composite numbers

Common Core

4.OA.B.4 6.NS.B.4 MP5 MP7