Chapter 3 Lesson 5

Chapter 3
Lesson 5 – Least Common Multiple

 GOAL: To determine the LCM of a pair of numbers

 Warm-Up:What are the multiples of…..

2? _____________________________

3? ______________________________

5? ______________________________

 Defn: The _________ __________ _______

(LCM) is the smallest multiple that 2 or more numbers have
in common

 Defn: _________ factorization is finding all the prime

factors of a number

Steps to finding the LCM

 Step 1: Find the prime factorization of each

number

 Step 2: Circle any common factors

 Step 3: Multiply each common factor by ALL

leftover factors

Math Response

Find the LCM of 8 and 26

Type answer here

Correct Answer: 104

Deg^°

Rad

Math Response

Find the LCM of 48 and 63

Type answer here

Correct Answer: 1008

Deg^°

Rad

Math Response

Find the LCM of 10 and 24

Type answer here

Correct Answer: 120

Deg^°

Rad

Math Response

Find the LCM of 28 and 35

Type answer here

Correct Answer: 140

Deg^°

Rad

Multiple Choice

What is the Least Common Multiple of 3 and 13?

• 13

• 39

• 26

• 24

Math Response

What is the LCM of 25 and 36

Type answer here

Correct Answer: 900

Deg^°

Rad

Math Response

Find the least common multiple for the number pair.

10 and 32

Type answer here

Correct Answer: 160

Deg^°

Rad

Multiple Choice

Least Common Multiple of 35x and 10

• 70x

• 135x

• 350x

• 5x