Greatest Common Factor Review

Greatest Common Factor

What is the Greatest Common Factor used for?

To simplify fractions (and algebra later in math)

Multiple Select

When do we use the Greatest Common Factor?

Check all that apply.

• Adding Fractions

• Simplifying

• Subtracting Fractions

• Multiplying Fractions

• Dividing Fractions

Open Ended

List the factors of 6

Open Ended

List the factors of 18

Open Ended

What is the GCF of 6 and 18?

Multiple Choice

What is the GCF of 24 & 56?

• 16

• 8

• 12

• 4

Multiple Choice

What is the GCF of 4 and 12?

• 3

• 6

• 4

• 1

Open Ended

What is the GCF of 28 and 49?

Multiple Choice

When reducing fractions to their lowest terms, which number do we divide by the GCF?

• Numerator

• Denominator

• Both

• Whichever is bigger

Multiple Choice

What is 18/48 in simplest terms?

• 4/6

• 3/8

• 2/5

• 3/7

Multiple Choice

What is 54/99 in simplest form?

• 6/12

• 4/9

• 7/12

• 6/11

Open Ended

What is the GCF of 20, 44 and 88?

Multiple Choice

Which of the numbers below are prime?

• 21

• 9

• 89

• 44

Multiple Choice

What does GCF stand for?

• Least Common Factor

• Greatest Common Factor

• Gray Cats Flying

• Grand Carousel Factors