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FacToring

FacToring. Glencoe Chapter 10 Section 1- Ms. Moye. Review: . What is a prime number? Well, it’s a number that has exactly two factors: itself and one Example: 5 It’s factors are 5 and 1. Review: . Who remembers what a composite number is?

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FacToring

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  1. FacToring Glencoe Chapter 10 Section 1- Ms. Moye

  2. Review: • What is a prime number? • Well, it’s a number that has exactly two factors: itself and one • Example: 5 • It’s factors are 5 and 1.

  3. Review: • Who remembers what a composite number is? • Composite numbers are numbers with more than two factors. (Not including 1.) • Example: 12 • 12 factors into 2, 2 and 3.

  4. Prime Factorization • We’re going to start by learning how to express a composite number in terms of it’s prime factors. • My favorite method is the tree method: 8 8 = 4 * 2 4 = 2 * 2 http://thefactortree.com/2010/10/what-is-a-factor-tree/

  5. An example: What numbers go into 48? 1 and 48 2 and 24 3 and 16 4 and 12 6 and 8

  6. An example: What numbers go into 8? 1 and 8, 2 and 4 What numbers go into 6? 1 and 6, 2 and 3

  7. An example: Do any of these numbers need to be factored further?

  8. An example: http://www.alleyoop.com/blog/2011/02/27/math-facts-factor-trees/

  9. Solution • This example showed us that 48 has 5 prime factors: • 2 • 3 • 2 • 2 • 2

  10. Try it on your own: • Try factoring the number 42 on your own. • (Hint: Start by finding one number that you know goes into 42 and work from there)

  11. Time to pause the video!

  12. Solutions: http://thefactortree.com/2010/10/what-is-a-factor-tree/

  13. CONGRATS!! Time to finish your worksheet!

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