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# Patterns and Expressions

## Write variable expressions to represent word problems.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Addition and Subtraction Phrases as Expressions

Learn how to write addition and subtraction phrases as single variable expressions.
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## Multiplication and Division Phrases as Expressions

Learn to write multiplication and division phrases as single variable expressions.
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2

## Translate Verbal Phrases into Variable Expressions

Learn to change words into variable expressions.
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9

## Patterns and Expressions

Write and solve algebraic equations that model verbal situations.
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9
• PLIX

## Patterns and Expressions: Cookie Jars

Patterns and Expressions Interactive
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• Video

## Write an Equation: A Sample Application

This video demonstrates a sample use of the principles of writing an algebraic equation.
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• Video

## Write an Equation: An Explanation of the Concept

This video provides an explanation of the concept of writing an algebraic equation.
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• Video

## Writing Basic Algebraic Expressions

Explains how to convert algebraic equations to phrases. The video also shows the different ways to expresses multiplication algebraically.
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2
• 2
• Critical Thinking