how-to-find-the-greatest-common-factor-gcf-using-the-definition

# Interactive video lesson plan for: How to find the greatest common factor (GCF) using the definition

#### Activity overview:

The basics of the concept of the greatest common factor (GCF) of two numbers. The name itself explains what to do: find the factors of the two numbers, find the COMMON ones among them, and choose the greatest.

I go through several examples using this definition.

In the 2nd part of the lesson (at https://www.youtube.com/watch?v=DIKRJysC9HU) I show a another method for finding the GCF, which is based on the prime factorization of the numbers.

This lesson is meant for 6th grade math and onward.

Tagged under: greatest common factor,gcf,6th grade,math

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