Download 1-2 Prime Factors 2016.notebook

1­2 Prime Factors 2016.notebook
September 01, 2016
lesson 1-2 prime factors
Nov 19­4:22 PM
Objectives: To understand what factors and and how they can be manipulated and used. To find and use the prime factorization. Skills: factors can be used to help divide
Virtues: Looking at things from a different perspective
Jul 16­1:30 PM
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1­2 Prime Factors 2016.notebook
Factors­
September 01, 2016
2 or more numbers being multiplied together
product
1 x 7 = 7
2 x 3 x 5 = 30
product
factors of 7
factors of 30
when a number has only 2 factors, divisible by only one and itself (1 is not a prime or composite numer)
Prime numbers­ Examples:
when a number has more than 2 factors
Composite numbers­ Examples:
Nov 19­4:23 PM
How do you know if a number is a factor or not? or is Prime or not?
Divisibility Rules:
2: If a number is even
3: If when you add the digits, that number is divisible by 3
4: If it is still even after you divide by 2, or if the last two digits are a number divisible by 4
5: If it ends in a 0 or 5
6: If it is divisible by 2 and 3
7: You gotta know your multiples of 7
8: If the last three digits are a number divisible by 8
9: If when you add the digits, that number is divisible by 9
10: If it ends in 0
Jul 16­1:54 PM
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1­2 Prime Factors 2016.notebook
September 01, 2016
Nov 19­4:31 PM
Find the prime factorization of each number.
36
36
45
104
*There is usually more than one way to build the factor tree, but they all should give you the SAME prime factorization at the end.
Nov 19­4:46 PM
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1­2 Prime Factors 2016.notebook
September 01, 2016
http://www.mathplayground.com/factortrees.html
Nov 19­4:39 PM
Summary
Objectives: To understand what factors and and how they can be manipulated and used. To find and use the prime factorization. Skills: factors can be used to help divide
Virtues: Looking at things from a different perspective
Assignment: Workbooks pg.
#'s
Jul 16­10:06 AM
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1­2 Prime Factors 2016.notebook
September 01, 2016
Exit Questions
1. Circle if it's prime, Square if it's composite:
5, 2, 9, 32, 17, 1, 51, 0, 119
2. Write the prime factorization of 96
3. Make a list of the factors of 96
Jul 16­10:05 AM
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