Finding the Greatest Common Factor

# Finding the Greatest Common Factor

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## Finding the Greatest Common Factor

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1. Lesson Objectives • 6.B.1.c Identify the greatest common factor 3.A.1.a Use technology tools, including software and hardware, from a range of teacher-selected options to learn a new content or reinforce skills

2. Think Backwards… • Find Factors • Circle Common Factors • Group Greatest Factor

3. Step 1: Find the Factors • 24 – 1,2,3,4,6,8,12,24 • 36 – 1,2,3,4,6,9,12,18,36

4. Step 2: Circle Common Factors • 24 – 1,2,3,4,6,8,12,24 • 36 – 1,2,3,4,6,9,12,18,36

5. Step 3: Group the Greatest Factor • 24 – 1,2,3,4,6,8,12,24 • 36 – 1,2,3,4,6,9,12,18,36

6. Now let’s try finding the GCF

7. Find the GCF of 12 and 24 • Step 1: Find the factors • 12 – 1,2,3,4,6,12 • 24 – 1,2,3,4,6,8,12,24

8. Find the GCF of 12 and 24 • Step 2: Circle the common factors • 12 – 1,2,3,4,6,12 • 24 – 1,2,3,4,6,8,12,24

9. Find the GCF of 12 and 24 • Step 3: Group the greatest factor • 12 – 1,2,3,4,6,12 • 24 – 1,2,3,4,6,8,12,24

10. Your turn! • Find the Greatest Common Factor of 16 and 20. • Remember…Find Factors, Circle Common, Group Greatest!

11. Are you ready? Let's try some more!