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Wednesday, October 12 th

Wednesday, October 12 th. Warm Up. Please write down Homework and complete Warm UP. Is 51 divisible by 6? Why? Is 1,551 prime or composite? Why?. Corny Joke of the Day. How does the ocean pay it’s water bills? With sand dollars!. Schedule for the Week.

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Wednesday, October 12 th

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  1. Wednesday, October 12th Warm Up Please write down Homework and complete Warm UP Is 51 divisible by 6? Why? Is 1,551 prime or composite? Why?

  2. Corny Joke of the Day How does the ocean pay it’s water bills? With sand dollars!

  3. Schedule for the Week Wednesday: Prime Factorization day #1 Thursday: Syllabus signed! Prime Factorization day #2 Friday: Review and Quiz. WEEKLY REVIEW DUE

  4. Review Do you know your divisibility?

  5. A number is divisible by 2 if………..

  6. A number is divisible by 3 if………..

  7. A number is divisible by 4 if………..

  8. A number is divisible by 5 if………..

  9. A number is divisible by 6 if………..

  10. A number is divisible by 9 if………..

  11. Discuss in your groups the Question of the day…be ready to PROVE your answer! 1,407 or 2,303 Are the numbers PRIME or COMPOSITE and why

  12. It’s….NOTES TIME!!!!!!!!

  13. 1. Vocab Review • A Prime number is a number that has exactly factors- • A Composite Number is a number that has 2 factors. • The number is neither prime nor composite because

  14. 2. Practice,Practice,Practice Tell whether each number is prime or composite • 33 • 134 • 83 • 99

  15. 3. Prime Factorization

  16. i. Vocab • Whole numbers that are multiplied to find a product are called factors of that product. • A number is divisible by its factors. 2 6 3 6 2 3 = ÷ = 6 is divisible by 3 and 2. 3 6 ÷ 2 = Factors Product

  17. What is it? Prime Factorization- writing a number as the product of its primefactors.

  18. Method #1 The Tree Method

  19. ii. Steps to Prime Factorization a. To find the prime factorization, start with any pair of factors. b. If you have a prime factor, circle it. c. If you have a composite number, continue by listing a pair of factors d. Continue until each branch ends at a primefactor e. Write the primefactors using exponents-smallest base to largest base

  20. Just Watch Write the prime factorization of 24. Choose any two factors of 24 to begin. Keep finding factors until each branch ends at a prime factor. Remember, 2 is PRIME 24 24 • 4 • 6 OR 2 12 • • • 2 2 6 3 2 2 • 2 3 24 = 3 • 2 • 2 • 2 24 = 2 • 2 • 2 • 3 The prime factorization of 24 is 2 • 2 • 2 • 3, or 23 • 3.

  21. You Try a.16 b. 300 c. 27 d. 81

  22. Worktime • Complete double sided worksheet. • Be sure to show your work! Hint: Use your notes to help you 

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