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GCF and LCM using Prime factorization

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GCF and LCM using Prime factorization - PowerPoint PPT Presentation


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Hitting 2 birds with one stone. GCF and LCM using Prime factorization. First, do a factor tree for both numbers. 56. 42. 2. 2. 3. 7. 7. 6. 8. 7. 2. 3. 4. 2. 2. 2. 2. GCF and LCM. The GCF is everything in the intersection of the two circles multiplied. GCF = 2 ∙ 7 = 14.

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gcf and lcm
GCF and LCM

The GCF is everything in the intersection of the two circles multiplied.

GCF = 2 ∙7 = 14

56

42

2

2

3

7

7

6

8

7

2

3

4

2

2

2

2

The LCM is everything in ALL of the two circles multiplied.

LCM = 2 ∙ 2 ∙2 ∙3 ∙7 = 168