Grade 6 · The Number System

CCSS.MATH.CONTENT.6.NS.B.4

Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1—100 with a common factor as a multiple of a sum of two whole numbers with no common factor.

Read this standard on the official Common Core site

Lessons that teach this standard

• Least Common Denominator: Finding a Shared Bottom Number

  How to find the least common denominator of two fractions using multiples, prime factors, or the multiply-the-bottoms shortcut, and why you need one.

• Simplifying Fractions: Reducing to Lowest Terms

  How to simplify a fraction by dividing top and bottom by a common factor, how to use the GCF to do it in one step, and how to know when you are done.