Finding LCM and GCF Concepts

In this video, Miss B introduces the concepts of least common multiple (LCM) and greatest common factor (GCF) for sixth-grade students. She explains how to find the LCM by skip counting and multiplying numbers until the smallest common multiple is found. An alternative method using prime factorization is also demonstrated. For GCF, she shows how to divide numbers to find the greatest common factor. The video concludes with a call to action for viewers to subscribe for more content.

What does the term 'factor' mean in the context of Greatest Common Factor?

• Divide

• Subtract

• Multiply

• Add

What is the first step in finding the Least Common Multiple?

• Subtract the numbers

• Add the numbers

• Skip count the numbers

• Divide the numbers

Which of the following is a method to find the LCM?

• Skip counting

• Division

• Addition

• Subtraction

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

• Multiply the numbers

• Divide the numbers

• Find the smallest common multiple

• List multiples

What is the purpose of finding the Least Common Multiple?

• To add two numbers

• To find the largest number that divides two or more numbers

• To find the smallest number that is a multiple of two or more numbers

• To subtract two numbers

When finding the LCM of 9, 12, and 18, what is the first common multiple?

• 36

• 27

• 18

• 45

What is the result of 9 times 4 in the context of finding the LCM?

• 54

• 45

• 36

• 27

Which number is a common multiple of 9, 12, and 18?

• 36

• 18

• 24

• 30

What is the result of 12 times 3 in the context of finding the LCM?

• 36

• 42

• 30

• 24

What is the LCM of 9, 12, and 18 using skip counting?

• 36

• 18

• 24

• 30