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Section3.1_Factors_and_Multiples_of_Whole_Numbers.notebook
November 19, 2013
Example: Write the prime factorization of the following.
A) 54 B) 512
Method 1: Factor Tree
Method 2: Repeated division by prime factors. Keep dividing by prime factors until your quotient is 1.
Do questions 4 ­ 6, page 140
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Section3.1_Factors_and_Multiples_of_Whole_Numbers.notebook
November 19, 2013
Greatest Common Factor (GCF) : The greatest number that divides into each number in a set.
Example: Find the GCF of 12 and 18.
Method 1: List the factors of each number and chose the largest common factor.
Method 2: Prime Factorization (Product of Primes)
Highlight the factors that appear in each prime factorization. then multiply the common factors. The GCF is the product of the Common Factors. 2
Section3.1_Factors_and_Multiples_of_Whole_Numbers.notebook
Example:
November 19, 2013
Determine the GCF of:
A) 90, 54, and 72.
B) 75, 200, and 250
Do questions 4 ­ 6, 8, 9 on page 140
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