Exploring LCM and GCF Concepts

The video tutorial for sixth graders covers the concepts of multiples and factors, using the number 16 as an example. It explains how multiples are numbers obtained by multiplying a number by integers, and factors are numbers that multiply together to form a product. The lesson also introduces the concepts of least common multiple (LCM) and greatest common factor (GCF), providing step-by-step examples to find them. Students are encouraged to practice finding multiples and factors on their own.

What should you do before starting this lesson?

• Read a book

• Watch the previous two lessons

• Complete your homework

• Take a break

Tags

CCSS.RI. 9-10.10

CCSS.RI.6.10

CCSS.RI.7.10

CCSS.RI.8.10

CCSS.RL.9-10.10

What is the multiple of 16 when multiplied by 3?

• 48

• 32

• 64

• 80

Which of the following is NOT a multiple of 16?

• 50

• 64

• 32

• 16

Tags

CCSS.4.OA.B.4

What are factors?

• Numbers that add up to a product

• Numbers that divide a product

• Numbers that multiply together to equal a product

• Numbers that subtract to a product

Tags

CCSS.4.OA.B.4

Which of the following is a factor of 16?

• 5

• 8

• 12

• 3

Tags

CCSS.4.OA.B.4

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

• 36

• 18

• 24

• 48

What is the first step in finding the LCM or GCF?

• Find the highest number

• Divide the numbers

• Look for common numbers

• List the factors or multiples

What is the greatest common factor (GCF) of 40 and 64?

• 32

• 8

• 4

• 16

Which number is a common factor of both 40 and 64?

• 3

• 8

• 10

• 5

Tags

CCSS.4.OA.B.4

What is the LCM of 12 and 15?

• 45

• 60

• 75

• 30