Please write down Homework and complete Warm UP

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Presentation transcript:

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

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

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

Do you know your divisibility? Review Do you know your divisibility?

A number is divisible by 2 if………..

A number is divisible by 3 if………..

A number is divisible by 4 if………..

A number is divisible by 5 if………..

A number is divisible by 6 if………..

A number is divisible by 9 if………..

1,407 or 2,303 Are the numbers PRIME or COMPOSITE and why 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

It’s….NOTES TIME!!!!!!!!

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

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

3. Prime Factorization

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 3 = 6 6 ÷ 3 = 2 6 is divisible by 3 and 2. 6 ÷ 2 = 3 Factors Product

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

Method #1 The Tree Method

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 prime factor e. Write the prime factors using exponents-smallest base to largest base

Write the prime factorization of 24. 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 2 • • 12 OR 6 4 2 • 6 3 • 2 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.

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

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