chapter 8 lesson 2.notebook - mansfield township ......chapter 8 lesson 2.notebook 5 february 28,...
TRANSCRIPT
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Chapter 8 Lesson 2.notebook
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New Vocabulary
Common Factors: shared factors
Greatest Common Factor (GCF): largest shared factors
Example: 14 and 28
common factors include 1,2,7,14
greatest common factor is 14
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By The End of the Lesson
You should understand:
you can write the prime factorization to find common factors of two or more numbers
the greatest of the common factors of two or more numbers is called the GCF, greatest common factor
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Greatest Common Factor
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Definition:
The Greatest Common Factor is the greatest number that is a factor of two or more numbers.
Example: The GCF of 6 and 8 = 2
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There are several ways to find the GCF between two numbers.
One way that you have learned is just to list the factors.
Factors of 12 = (1, 2, 3, 4, 6, 12)
Factors of 24 = (1, 2, 3, 4, 6, 8, 12, 24)
Then, you circle the common factors and find the largest one which is the........GREATEST COMMON FACTOR!
What is the GCF of 12 and 24?12
Answer
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Another way to find the GCF between two numbers is to use a
factor tree.
12 24
3 4 4 6
2 2 2 32 2
2 X 2 X 3 = 12 2 X 2 X 2 X 3 = 24
GCF = 2 x 2 x 3 = 12
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Find the GCF of 12 and 66.(Teacher led)
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Find the GCF of 36 and 45.(Teacher led)
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Page 557
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Homework pages 561562
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Vocabulary Cards Review:
numerator
denominator
fraction
common factor
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