Background Tutorials

• Apply properties of operations as strategies to multiply and divide.

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    How Can You Distribute Numbers When You're Adding and Multiplying?

    You can use the distributive property to help you add and multiply numbers! Follow along with this tutorial to see the uses of the distributive property.

• Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

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    Which Operations Do You Do First in an Expression?

    You can't simplify a problem without the order of operations. In this tutorial, you'll learn about this special order and see how to use it to solve a problem!

• Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 × 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5. Represent verbal statements of multiplicative comparisons as multiplication equations.

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    What is Multiplication?

    Multiplying integers is just like performing a bunch of additions of the same integer! Check out this tutorial and see how much multiplying and repeated addition have in common.

• Fluently add and subtract multi-digit whole numbers using the standard algorithm.

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    How Do You Add Whole Numbers?

    To add numbers, you can line up the numbers vertically and then add the matching places together. This tutorial shows you how to add numbers vertically!

• Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols.

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    How Do You Simplify an Expression Using the Order of Operations?

    You can't simplify an expression without fully understanding the order of operation! Follow along with this tutorial to see how to use the order of operations to simplify an expression.