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**GCF – Greatest Common Factor 4-3**

6.NS.4 I can find the greatest common factors of two whole numbers less than or equal to 100

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**LCM – Least Common Multiple**

6.NS.4 I can fin the least common multiple of two numbers less than or equal to 12

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**Greatest Common Factor**

What are we trying to find? What are factors? Can you write your own defintion?

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**Least Common Multiple What are we trying to find? What are multiples?**

Can you write your own defintion?

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**The Greatest Common Factor (GCF) of 2 numbers is the largest factor the 2 numbers have in common.**

Factors of 24: Factors of 36: Common factors: 1, 2, 3, 4, 6, 8, 12, 24 1, 2, 3, 4, 6, 9, 12, 18, 36 1, 2, 3, 4, 6, 12 The greatest common factor (GCF) of 24 and 36 is 12.

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**List the multiples and circle the smallest on they have in common**

The Least Common Multiple (LCM) is the smallest number that is a multiple of two numbers. List the multiples and circle the smallest on they have in common 4: 4, 8, 12 , 16, 20, 24, 28, 32, 36, 40, 44, … 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, . . .

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Find the GCF and LCM 9 , 12 GCF: LCM:

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**Keep them Straight…… Focus on the key words: Multiple and Factors.**

Least Common Multiple Greatest Common Factor Multiple: Factors:

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**Find the Greatest Common Factor**

3, 4 12, 18 9, 21

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**Find the Least Common Multiple**

2, 10 5, 6 3, 12

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**How well can you find the LCM and GCF of two numbers?**

. I don’t understand I nearly understand I fully understand 11

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Watch and Learn….. LCM Video GCF Video

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