Understanding Least Common Multiple (LCM) Methods

The video tutorial from Movu Math introduces three methods to find the least common multiple (LCM): the ladder method, the traditional method, and the factor tree method. Each method is explained with examples, starting with two numbers (20 and 35) and then extending to three numbers (6, 12, and 36). The tutorial emphasizes the importance of choosing the right method based on the situation and provides a step-by-step guide for each technique. The video aims to help viewers understand and apply these methods effectively to find the LCM.

What are the three methods introduced in the video to find the Least Common Multiple?

• Ladder method, traditional factoring, and factor tree

• Addition, subtraction, and multiplication

• Division, multiplication, and subtraction

• Graphing, solving equations, and inequalities

In the ladder method, what is the first step to find the LCM of two numbers?

• Multiply the numbers together

• Subtract the smaller number from the larger number

• Find the smallest prime number that divides both numbers

• Add the numbers together

Using the ladder method, what is the LCM of 20 and 35?

• 100

• 35

• 70

• 140

In the traditional method, what do you do after listing the multiples of each number?

• Add the multiples together

• Divide the largest multiple by the smallest

• Find the smallest common multiple

• Subtract the multiples

What is the LCM of 20 and 35 using the traditional method?

• 100

• 60

• 140

• 80

In the factor tree method, what is the first step?

• Add the numbers

• Break down the numbers into their prime factors

• Divide the numbers by 2

• Multiply the numbers

Using the factor tree method, what is the LCM of 20 and 35?

• 100

• 70

• 140

• 35

When finding the LCM of 6, 12, and 36 using the ladder method, what is the final LCM?

• 18

• 24

• 36

• 12

In the traditional method, what is the LCM of 6, 12, and 36?

• 12

• 24

• 36

• 18

Using the factor tree method, what is the LCM of 6, 12, and 36?

• 12

• 18

• 36

• 24