Fifth graders use the rules for divisibility and other notions to find the prime factorization of unfamiliar numbers.
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Prime Factorization and Product of Primes
Demonstrate a method for finding the prime factorization of numbers using factor trees and a video that explains how to break a number down to its prime factors. The instructor reinforces the concept of factors by displaying the number...
5 mins 3rd - 7th Math CCSS: Adaptable
Study Jams! Greatest Common Factor
When one method isn't enough to teach GCF, try two! This interactive webpage introduces factors and the prime factor tree to find the greatest common factor of two numbers. After the lesson, have learners click to try the two examples...
5th - 8th Math CCSS: Adaptable
Study Jams! Prime & Composite Numbers
Prime or composite, that is the question. Teach your class how to find the answer with this step-by-step presentation that defines and provides examples of each type of number. When addressing larger numbers, divisibility rules are...
3rd - 6th Math CCSS: Adaptable