Common Factors

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?

(hint: there is only one answer)

• Adding Fractions

• Simplifying Fractions

• Subtracting Fractions

• Multiplying 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 4 and 12?

(hint: what is the smallest number that they can both be divided by?)

• 3

• 6

• 4

• 1

Multiple Choice

What is the GCF of 24 & 56?

(hint: what is the smallest number that they can both be divided by?)

• 16

• 8

• 12

• 4

Open Ended

What is the GCF of 28 and 49?

Open Ended

What is the GCF of 20 and 44?

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