Common Multiples

LCM & Mixed/Improper

We use the LCM to create common denominators. Common denominators are needed to add and subtract fractions.

Multiple Select

When do we use the LCM?

• subtracting fractions

• adding fractions

• finding a common denominator

• multiplying fractions

Multiple Choice

List the first five multiples of 7

• 7, 15, 21, 29, 35

• 7, 14, 23, 28, 35

• 7, 16, 21, 28, 35

• 7, 14, 21, 28, 35

Multiple Choice

What is the least common denominator of 6/8 and 4/12?

• 12

• 8

• 24

• 16

Open Ended

List the first seven multiples of 8

Multiple Choice

What is the LCM of 5 & 20?

• 100

• 80

• 20

• 5

Open Ended

List the first eight multiples of 6

Multiple Choice

What is the least common denominator of 1/9 & 2/3?

• 6

• 3

• 21

• 9

Multiple Choice

Ethan ate 4/7 of one pie and Elle ate 23/49 of a different pie. What number would you use to create a common denominator?

• 7

• 49

• 28

• 198

Open Ended

What is the LCM of 12 and 8?

Multiple Choice

What is the common denominator of 2/9 and 4/7

• 18

• 63

• 21

• 24

• 28

Open Ended

What is the LCM of 12 and 14?

Multiple Choice

Makayla and Noelle both bought a pizza on National Pizza Day. They wanted to celebrate together, Makayla cut her pizza into 16 slices. Noelle cut her pizza into 8 slices. Could they make equivalent pizza slices?

• Yes

• No

Multiple Choice

• 6/9

• 9/9

• 6/6

• 2/3