Understanding Least Common Multiple (LCM)

The video tutorial introduces the concept of the least common multiple (LCM), explaining it as the smallest number that is a multiple of two or more numbers. It provides a step-by-step guide to finding the LCM using examples with numbers 5 and 10, and 6, 8, and 12. The tutorial emphasizes the importance of learning multiplication tables to easily identify multiples and find the LCM. It also clarifies why zero is not considered a multiple when calculating LCM.

What is the Least Common Multiple (LCM)?

• The largest number that divides two numbers

• The smallest number that is a multiple of two or more numbers

• The sum of two numbers

• The difference between two numbers

Which of the following is a common multiple of 5 and 10?

• 25

• 10

• 35

• 15

What is the first step in finding the LCM of two numbers?

• Divide the numbers

• Add the numbers

• List the multiples of each number

• Subtract the numbers

What is the LCM of 5 and 10?

• 10

• 15

• 5

• 20

Which of the following is NOT a step in finding the LCM?

• Add the numbers

• Identify common multiples

• Write the smallest common multiple

• List the multiples

What is the smallest common multiple of 5 and 10?

• 10

• 5

• 15

• 20

Which of the following is a common multiple of 6, 8, and 12?

• 36

• 30

• 24

• 18

What is the LCM of 6, 8, and 12?

• 12

• 18

• 24

• 30

Why is zero not considered when finding the LCM?

• Because the LCM would always be zero

• Because zero is a prime number

• Because zero is not a multiple of any number

• Because zero is not a number

What is important to learn to find multiples and LCM?

• Division tables

• Multiplication tables

• Subtraction tables

• Addition tables