Lesson 2 GCF and LCM

Greatest Common Factor and Least Common Multiple


I can find the greatest common factor (GCF) of two whole numbers less than or equal to 100.

I can find the least common multiple (LCM) of two whole numbers less than or equal to 12.


Khan Instruction/Tutorial: (watch these to get started)



GCF and LCM word problems:

Once you’ve watched the video, practice what you’ve learned using the links below.

Interactive Lessons/Activities: (Click the links to practice)

Prime Factors Game (mathgoodies.com)

Fruit Splat: Greatest Common Factor Game (sheppardsoftware.com) 

Snowball Fight: Least Common Multiple (fun4thebrain.com) 

 Do you have questions? Can I help? Submit a question to www.ask.fm/misterelders

When you understand how to find the GCF and LCM, use the links below to demonstrate your understanding. Be sure to log in with the account you set up at our first meeting so I can follow your progress!

Formative Assessments (Click the links below)

Quick check on greatest common factors

Quick check on least common multiples

When you get a star on this assessment you’re ready to practice this skill in our face to face meeting. Do not move on to lesson 3 until after we meet in July.

Return to the summer math home page.

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