Computer Program for XBOX 360 Prime Factorization Chapter 2 Lesson 1

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

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

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

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.

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.

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?

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

You try! Find the prime factorization for 144. For more practice on prime factorization click on the link below: http://www.mathsisfun.com/prime-factorization.html

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

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

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