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Finding the Greatest Common Factor. Grade 5. 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. Think Backwards….
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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
Think Backwards… • Find Factors • Circle Common Factors • Group Greatest Factor
Step 1: Find the Factors • 24 – 1,2,3,4,6,8,12,24 • 36 – 1,2,3,4,6,9,12,18,36
Step 2: Circle Common Factors • 24 – 1,2,3,4,6,8,12,24 • 36 – 1,2,3,4,6,9,12,18,36
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
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
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
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
Your turn! • Find the Greatest Common Factor of 16 and 20. • Remember…Find Factors, Circle Common, Group Greatest!
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