Finding the Least Common Multiple: Step-by-Step Guide

In this video, Mr. J explains how to find the least common multiple (LCM) of two numbers. He introduces the concept of multiples and demonstrates how to find the LCM through examples. The video covers two examples: finding the LCM of 9 and 12, and finding the LCM of 10 and 25. Mr. J emphasizes the importance of listing multiples and identifying common multiples to determine the LCM. The video concludes with a summary of the process and encourages viewers to practice finding LCMs.

What does LCM stand for?

• Last Common Multiple

• Lowest Common Multiple

• Least Common Multiple

• Largest Common Multiple

Which of the following is a multiple of 5?

• 14

• 7

• 10

• 12

Tags

CCSS.4.OA.B.4

What is the first multiple of 9?

• 36

• 18

• 27

• 9

What is the least common multiple (LCM) of 9 and 12?

• 24

• 18

• 45

• 36

How many multiples should you list to find the LCM?

• 3 or 4

• 2 or 3

• 1 or 2

• 4 or 5

What is the second multiple of 10?

• 20

• 30

• 40

• 10

What is the least common multiple (LCM) of 10 and 25?

• 100

• 25

• 75

• 50

What is the fourth multiple of 25?

• 75

• 100

• 50

• 125

What is the fifth multiple of 12?

• 48

• 84

• 60

• 72

What is the main takeaway about common multiples?

• They are finite

• They are endless

• They are always the same

• They are always different