1. Opener: Check each number below for divisibility by 2, 3, 5, 6, 9 and 10. Opener: Check each number below for divisibility by 2, 3, 5, 6, 9 and 10. 1.) 7,3022.) 873.) 22 4.) 475.) 1,0006.) 3,030

2. Unit 2 Section 2.2 – Prime Factorization

3. Objective : to write any whole number as the product of primes. Vocabulary Prime – Composite – Factorization – Exponent - Hard to believe fact: EVERY number (except for 0 and 1, but you know how they can be) is created by multiplying ONLY prime numbers.

4. Prime factorization requires you to factor a number into the primes that create it. Example Example Way 1Way 2 24 24 24 24

5. Example Example Way 1 Way 2 50 50 50 50 Example Example Way 1 Way 2 120 120 120 120

6. Skill Practice: Complete prime factorizations for the following problems. 1.) 452.) 4,0003.) 71 4.) 995.) 366.) 64

7. Homework: Course 1: PW p. 59 & 60 even Course 2: PW p. 41 & 42 2-22 even Extensions: ClassZone Animated Math ClassZone Animated Math (Chapter 5 – Creating a Factor Tree)