warm-up list the factors for the following numbers: 1.30 2.66 3.71 1, 2, 3, 5, 6, 10, 15, 30 1, 2,...
TRANSCRIPT
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Warm-upWarm-upList the factors for the following numbers:
1. 30
2. 66
3. 71
1, 2, 3, 5, 6, 10, 15, 30
1, 2, 3, 6,11, 22, 33, 66
1, 71
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TestsTests(Pre Progress Reports)(Pre Progress Reports)
TextbooksTextbooks
My WebsiteMy Website
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What am I Learning Today?What am I Learning Today?
Factors
Prime Factorization
How will I show that I learned it?How will I show that I learned it?Apply factors
Decompose Numbers into their Prime Factorization
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VocabularyVocabularyPrime Factorization: A number written as the
product of its prime factors.
Exponent: Tells how many times a number (the base) is used as a factor.
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You can use factors to write a number in different ways.
Factorization of 12
2 • 61 • 12 3 • 4 3 • 2 • 2
The prime factorization of a
number is the number written as the product
of its prime factors.
Notice that these factors are all prime.
What do you notice about how the last set of factors are written?
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A number is in exponential form when it is written with a base and an exponent.
7733Base
Exponent
= 7 7 7= 343
An exponent tells how many times a number called the base is used as a factor.
What is an exponent?What is an exponent?
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To decompose a number into its prime
factorization, you may use the tree or the
ladder method.
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Choose any two factors of 24 to begin. Keep finding factors until each branch ends at a prime factor.
24
2 12•
6
2
2 •
3•
24
6 4•
3 2 2 2
24 = 2 • 2 • 2 • 3
24 = 3 • 2 • 2 • 2
The prime factorization of 24 is 2 • 2 • 2 • 3
• •
Write the prime factorization of 24Write the prime factorization of 24(using a factor tree)(using a factor tree)
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The prime factorization of 24 is 2 • 2 • 2 • 3
To write your answer using To write your answer using exponentsexponents
2 • 3 3
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Choose a prime factor of 24 to begin. Keep dividing by prime factors until the quotient is 1.
2 24
2
1
12
6
24 = 2 • 2 • 2 • 3
3 24
2
1
8
2 4
24 = 3 • 2 • 2 • 2
The prime factorization of 24 is 2 • 2 • 2 • 3
Write the prime factorization of 24Write the prime factorization of 24
(using a ladder)(using a ladder)
2
33 2 2
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The prime factorization of 24 is 2 • 2 • 2 • 3
To write your answer using To write your answer using exponentsexponents
2 • 3 3
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PracticePractice
45 Tree Method Ladder Method
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PracticePractice
120 Tree Method Ladder Method
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PracticePractice
72 Tree Method Ladder Method
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PracticePractice
48 Tree Method Ladder Method
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GroupsGroups
Go to the color of your group.
Each person must be able to factor all problems in your clip to prime factors using both the ladder method and
the tree method.
When time is called, a member of your group will be called to the front to factor one of your problems to
primes using one of the methods.
You don’t know which member
You don’t know which problem
You don’t know which method