Greatest Common Factor

• Bite-size lesson on GCF

• Examples from Ms. Rohan

• Questions for you

• Accuracy counts; can improve :)

Factors = evenly "go into" the original number

You will need to pick all the factors of 16.

Do this by listing out all pairs of numbers that

multiply together to equal 16.

GREATEST COMMON FACTOR

You're about to see a 1 minute Youtube video

You can use headphones or just watch :)

It is completely possible to understand without hearing.

1. List the factors of each

2. Find the greatest one they have in common

You'll have three problems to find the Greatest Common Factor (GCF).

Make sure you choose the greatest common factor...

not just any common factor!

12's factors are: 1, 2, 3 ,4, 6, 12

16's factors are: 1, 2, 4, 8, 16

The greatest factor they have in common is 4!

8's factors are: 1, 2, 4, 8

16's factors are: 1, 2, 4, 8, 16

The greatest factor they have in common is 8!

But still find the same way:

1. List all the factors of each number

2. Find the greatest one in common

5's factors are: 1, 5

6's factors are: 1, 2, 3, 6

The greatest factor they have in common is just 1.

*Some people just say there is no significant GCF, when it's just 1*

You are nailing it! Keep it up!

We are going to increase the challenge a bit!

We'll need to know how to find GCF of variables, too!

• The greatest amount/exponent that each variable has in common (without going over!)

• Let's see an example...

You'll find the GCF of between variable terms

Thank you for participating!

Be sure to try again to improve your score

for daily grade credit and to improve your understanding.