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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 1 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 2 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 3 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 4 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 5