Greatest Common Factor Objective: Finding Greatest Common Factor (GCF) VocabularyThe greatest common factor is the biggest factor that is common to two.

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Presentation transcript:

Greatest Common Factor Objective: Finding Greatest Common Factor (GCF) VocabularyThe greatest common factor is the biggest factor that is common to two or more numbers.

Method 1: Listing the Factors Find the GCF of 24 and What’s the biggest common factor? The GCF of 24 and 40 is 8.

Method 2: Using Prime Factorization; “Upside-Down division ” Find the GCF of 45 and 60 45: 335 The common prime factors are 35; The GCF is :

Method 3: Using Prime Factorization; Factor Trees Find the GCF of 36 and 48 36: 2233 The common prime factors are 223; The GCF is : 22223