1. 4.3 prime factors October 27, 2011
Get with a partner.
Take turns selecting dominoes.
Pick one side to be the base
and one side to be the exponent.
Find the answer.
Objective: find prime factorization and greatest common factor
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2. 4.3 prime factors October 27, 2011
Prime Numbers: an integer greater than 1 with exactly 2
positive factors
Examples:
Composite Numbers: an integer greater than 1 with
more than 2 positive factors.
Examples:
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3. 4.3 prime factors October 27, 2011
List the prime numbers from 10 to 20.
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4. 4.3 prime factors October 27, 2011
Prime factorization: writing a composite number as a
product of its prime factors. We can use a factor tree to
find prime factorizations.
Use a factor tree to write the prime factorization of 825.
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5. 4.3 prime factors October 27, 2011
HW pg. 189
# 116, 2528
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6. 4.3 prime factors October 27, 2011
greatest common factor (GCF):
Find the GCF of each pair of numbers or expressions.
40 and 60 6a3b and 4a2b
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