LCM

What is Least Common Multiple?

• It is the least or smallest common multiple of the given pairs of numbers.

• We also have the same methods in getting LCM just like in GCF.

• Listing Method, Factor Tree, and Continuous Division.

Multiple Choice

Determine LCM of 15 and 27

• 130

• 3

• 135

• 9

Listing Method

3: 3,6,9,12,15

4: 4,8,12,16,20

​Use the skip counting method to come up with the multiples of 3 and 4

Listing Method

• List all the multiples of the pair of numbers.

• Identify the least common multiple of the given numbers.

​Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, ...

Multiples of 7: 7, 14, 21, 28, 35, 42, ...

Multiple Choice

Using the Listing Method, what is the LCM of 4 and 10?

• 2

• 20

• 40

• 80

Multiple Choice

Determine LCM of 12 and 16

• 2

• 48

• 6

• 45

​OR

PRIME FACTORIZATION METHOD

Multiple Choice

Using the Factor Tree Method, what is the LCM of 5 and 20?

• 5

• 20

• 40

• 80

​CONTINUOUS DIVISION

OR

Multiple Choice

What is the LCM of 3 and 4?

• 9

• 12

• 15

• 16