1. Lesson 4-3

2. Math Vocabulary GCF (Greatest Common Factor): The highest number that can divide INTO two or more given numbers

3. Finding GCF When finding GCF… finding the highest #, the given number(s) can be divided by… usually = to smallest given # or smaller

4. Finding GCF Find the GCF of 40 and 60 can GCF = 40 must be less than 40 GCF = 20

5. Finding GCF Find the GCF of 6a³b and 4a²b GCF of #s Common variable(s) Lowest exponent of each variable GCF = 2a²b

6. Finding GCF Find the GCF of 12r³s⁵t² and 8r²s⁴t⁸ GCF of #s Common variable(s) Lowest exponent of each variable GCF = 4r²s⁴t³

7. Practice Find the GCF a) 8, 20 b) 12a, 15bc c) 15m²n, 45m d) 14fg³h⁹, 35f ⁵h⁴

8. Homework p. 183-184 #11-15, 29-44, 58-61