Background Tutorials

• 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.

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    How Do You Write a Fraction in Simplest Form Using the GCF?

    When you get a fraction as an answer, you're usually asked to write it in its simplest form. This tutorial shows you how to use the GCF of the numerator and denominator to fully simplify a fraction!

• Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities.

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    What's a Ratio?

    Ratios are everywhere! The scale on a map or blueprint is a ratio. Ingredients sometimes need to be mixed using ratios such as the ratio of water to cement mix when making cement. Watch this tutorial to learn about ratios. Then think of some ratios you've encountered before!