Exploring GCF and LCM Concepts

What should you do if you don't have scissors to make tabs?

• Use a knife instead

• Wait until you can get some scissors

• Use glue to stick the pages together

• Skip making the tabs

Where should you glue the fraction tab in your notebook?

• In the middle of the page

• On the back cover

• At the bottom of the page

• At the top of the blue line

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What is the first step in finding the GCF using the list method?

• Find the prime factors

• Divide the numbers by 2

• Add the numbers together

• List all factors of each number

Why is it important to list all factors when using the list method?

• To avoid using a calculator

• To make the process faster

• To check for prime numbers

• To ensure you find the greatest common factor

What is the GCF of 72 and 90 using the list method?

• 12

• 24

• 18

• 36

What is the first step in the ladder method for finding the GCF?

• Add the numbers together

• Subtract the smaller number from the larger number

• Divide by the smallest prime number

• List all factors

What is the GCF of 81 and 135 using the ladder method?

• 15

• 27

• 45

• 9

What is the purpose of finding the least common multiple (LCM)?

• To multiply fractions

• To find common denominators for adding or subtracting fractions

• To simplify fractions

• To divide fractions

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the LCM of 72 and 90 using the ladder method?

• 450

• 360

• 270

• 180

Which method is suggested for finding both GCF and LCM?

• Division method

• List method

• Prime factorization

• Ladder method