Wednesday, October 12 th Please write down Homework and complete Warm UP 1.Is 51 divisible by 6?...
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![Page 1: Wednesday, October 12 th Please write down Homework and complete Warm UP 1.Is 51 divisible by 6? Why? 2. Is 1,551 prime or composite? Why?](https://reader035.fdocuments.us/reader035/viewer/2022062620/551aed905503466b6a8b61ed/html5/thumbnails/1.jpg)
Wednesday, October 12th
• Please write down Homework and complete Warm UP
1. Is 51 divisible by 6? Why?
2. Is 1,551 prime or composite? Why?
Warm Up
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Corny Joke of the Day
How does the ocean pay it’s water bills?
With sand dollars!
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Schedule for the Week
Wednesday: Prime Factorization day #1Thursday: Syllabus signed! Prime Factorization day #2Friday: Review and Quiz. WEEKLY
REVIEW DUE
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Review Do you know your divisibility?
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A number is divisible by 2
if………..
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A number is divisible by 3
if………..
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A number is divisible by 4
if………..
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A number is divisible by 5
if………..
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A number is divisible by 6
if………..
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A number is divisible by 9
if………..
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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!
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It’s….NOTES TIME!!!!!!!!
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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
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2. Practice,Practice,Practice
Tell whether each number is prime or composite
a. 33b. 134c. 83d. 99
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3. Prime Factorization
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• 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=
FactorsProduct
26 3÷ =
6 ÷2 = 36 is divisible by 3 and 2.
i. Vocab
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What is it?
Prime Factorization- writing a number as the product of its
prime factors.
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Method #1
The Tree Method
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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
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Choose any two factors of 24 to begin. Keep finding factors until each branch ends at a prime factor.
Remember, 2 is PRIME24
2 12•
6
2
2 •
3•
24
6 4•
3 2 2 2
24 = 2 • 2 • 2 • 3
24 = 3 • 2 • 2 • 2
The prime factorization of 24 is 2 • 2 • 2 • 3, or 23 • 3.
• •
Write the prime factorization of 24.
Just Watch
OR
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You Try
a.16b. 300c. 27d. 81
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Worktimeo Complete double sided worksheet.
o Be sure to show your work!
Hint: Use your notes to help you