Finding the Greatest Common Factor

The video tutorial explains how to find the greatest common factor (GCF) of two numbers by listing factor pairs. It begins with a word problem involving treat bags and introduces the concept of factors and factor pairs. The tutorial outlines three steps to find the GCF: listing factor pairs, identifying common factors, and selecting the largest common factor. A practical example is provided, showing how to use the GCF to solve the treat bag problem, resulting in eight equal treat bags. The lesson concludes by reinforcing the application of GCF in solving word problems.

What is a factor pair?

• Two numbers that add up to a product

• Two numbers that multiply to a product

• Two numbers that divide a product

• Two numbers that subtract to a product

Which of the following is NOT a step in finding the greatest common factor?

• Identify the common factors

• Find the biggest common factor

• List the factor pairs

• Multiply the common factors

What is the greatest common factor of 32 and 40?

• 4

• 6

• 10

• 8

How many treat bags can Jon and Elly make using the greatest common factor?

• 10

• 8

• 6

• 4

If Jon has 32 pieces of gum, how many pieces will each bag contain when divided equally?

• 5

• 4

• 2

• 3

How many mints will each bag contain if Elly divides her 40 mints equally?

• 5

• 6

• 3

• 4

What is the significance of the greatest common factor in solving word problems?

• It helps in subtracting numbers

• It helps in multiplying numbers

• It helps in dividing numbers into equal groups

• It helps in adding numbers