Background Tutorials

• Fraction Basics

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    What's a Numerator and What's A Denominator?

    Numerators and denominators are the key ingredients that make fractions, so if you want to work with fractions, you have to know what numerators and denominators are. Lucky for you, this tutorial will teach you some great tricks for remembering what numerators and denominators are all about.

• Real Number Properties

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    What are the Identity Properties of Addition and Multiplication?

    Let's identify an identity! Addition and subtraction have a different identity than multiplication and division. Learn about each of these identities with this tutorial!

• Adding Real Numbers

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    How Do You Find a Common Denominator and a Least Common Denominator?

    This tutorial gives you some practice finding a common denominator and the least common denominator of three fractions. There's only one least common denominator, but there are many common denominators. This tutorial gives you one. Can you find another?

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    How Do You Add Fractions with Different Denominators?

    Trying to add fractions with unlike denominators? You're going to need a common denominator first! Follow along with this tutorial and see what you need to do to add these fractions together.

• Subtracting Real Numbers

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    How Do You Subtract a Positive Number from a Negative Number?

    Subtracting a positive from a negative? Just remember: subtracting a positive is the same as adding a negative. See how it works in this tutorial!

• Multiplying Real Numbers

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    How Do You Multiply Fractions?

    Working with fractions can be intimidating, but if you arm yourself with the right tools, you'll find that working with fractions is no harder than working with basic numbers. In this tutorial you'll see the process for multiplying 3 very simple fractions. Enjoy!