Grade 4 · Number and Operations—Fractions

CCSS.MATH.CONTENT.4.NF.A.1

Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions.

Read this standard on the official Common Core site

Lessons that teach this standard

• Equivalent Fractions: Same Amount, Different Numbers

  What equivalent fractions are, how to find them by multiplying or dividing top and bottom by the same number, and how to check two fractions are equal.

• 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.