1. Computer Program for XBOX 360
Prime Factorization Chapter 2 Lesson 1

2. Pre-Skills Review
Determine if the numbers below are prime (P) or composite (C) by writing a “P” or “C” on the lines. 2 : _______ 12: ______ 9 : _______ 14: ______ 3: ________ 15: ______ 11: _______ 5: _______ How many factors does a prime number have? How many factors does a composite number have? P C C C P C P P
2: (1 and itself)
More than 2

3. Essential Question:
How do you factor any number that is not prime?

4. I Can . . . Identify the factors of numbers.
Find the prime factorization of numbers.

5. Key Terms
Factor – A whole number that multiplies with another number to make a third number.
Product – The result when two numbers are multiplied.
Prime – A number that has exactly two factors (1 and itself).
Composite – A number with more than two factors.
Prime Factorization – To write a number as a product of its prime factors.

6. Mini Lesson
Computers use prime numbers in their programs to make them work correctly.
Jim, a computer programmer, has invented a new game for Xbox. To write the program he needs to break down composite numbers into their prime factors.
CHALLENGE: Help Jim find the prime factors of the following composite numbers.

7. What is the prime factorization of 48?
Use a factor tree to break down composite numbers into primes.
When you get a prime number circle it, then list all the prime numbers as a multiplication sentence.
What is the prime factorization of 48?

8. Let’s do 1 more!
What is the prime factorization of 100?

9. You try! Find the prime factorization for 144.
For more practice on prime factorization click on the link below:

10. Name Name Name Name So with this template:
The Hands-On Activities= Teacher Group
At Your Seat= Independent Work
Math Facts= Fluency
Teacher Choice= Station D
Name
Name
Name
Name

12. Sharing Time
How is a factor tree helpful in finding prime numbers?

13. Exit Ticket
The prime factorization of a number is 2 x 2 x 2 x 5. What is the mystery number? _____
Find the prime factorization 120. 40
2 x 2 x 2 x 3 x 5