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# Variable Expressions

## Letters representing numbers in arithmetic expressions

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.

## Variable Expressions

by CK-12 //basic

Choose variables and write expressions.

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• Video

## Why is "x" the Unknown?

by CK-12 //basic

Terry Moore answers the question "Why do we use x in algebra?" in this video.

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• Video

## Identifying Parts of an Expression - Overview

by CK-12 //basic

Overview

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• Video

## Evaluating Expressions Given a Variable Value - Example 1

by CK-12 //basic

Evaluating Opposite Expressions Given a Variable Value

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• Video

## Evaluating Expressions Given a Variable Value - Example 2

by CK-12 //basic

Evaluating Absolute Value Expressions Given a Variable Value

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• Video

## Identifying Parts of an Expression - Example 1

by CK-12 //basic

Determining Parts as Like Terms, Constants, and Coefficients Given a Math Statement

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• Flashcards

## Variable Expressions Flashcards

by CK-12 //basic

These flashcards help you study important terms and vocabulary from Variable Expressions.

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