Finding the Greatest Common Factor
Grade 6•45 minutes•5.NF.2
Learning Objective
I can find the greatest common factor (GCF) of two numbers by listing their factors and identifying the largest one they share.
Practice Questions
This lesson includes 4 practice questions to reinforce learning.
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1. List all the factors of 15 and 10. What is the greatest common factor of these two numbers?
2. Determine the GCF of 18 and 24 by listing their factors. Explain how you found the answer.
3. If two numbers have a GCF of 1, what does that tell you about those numbers? Provide an example of such a pair of numbers and explain why their GCF is 1.
...and 1 more questions
Educational Video
Greatest common factor explained | Factors and multiples | Pre-Algebra | Khan Academy
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