Presentation on theme: "4.3 Greatest Common Factors (GCF)"— Presentation transcript:
1 4.3 Greatest Common Factors (GCF) I can find the greatest common factor of a set of numbers
2 ReviewA factor is number that is multiplied by another number to get a product
3 The greatest common factor is the largest factor that two or more numbers share. Factors of 24:Factors of 36:Common factors:1,2,3,4,6,8,12,241,2,3,4,6,9,12,18,361, 2, 3, 4, 6,12The greatest common factor (GCF) of 24 and 36 is 12.Example 1 shows three different methods for finding the GCF.
4 Additional Example 1A: Finding the GCF Find the GCF of the set of numbers.28 and 42Method 1: List the factors.factors of 28:factors of 42:List all the factors.1,2,4,7,14,281,2,3,6,7,14,21,42Circle the GCF.The GCF of 28 and 42 is 14.
5 Find the GCF of the set of numbers. Check It Out: Example 1AFind the GCF of the set of numbers.18 and 36Method 1: List the factors.factors of 18:factors of 36:List all the factors.1,2,3,6,9,181,2,3,4,6,9,12,18,36Circle the GCF.The GCF of 18 and 36 is 18.