# Variable Expressions

## Letters representing numbers in arithmetic expressions

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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.
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## Variable Expressions

Choose variables and write expressions.
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## Variable Expressions

Choose variables and write expressions.
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## Variable Expressions0005

Choose variables and write expressions.
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## Variable Expressions, Variables y expresiones algebraicas, Spanish

by Pablo Beltran //basic
Elegir variables apropiadas y escribir expresiones algebraicas.
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## Variable Expressions

by Jonathan Long //basic
Choose variables and write expressions.
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## Maziya Variable Expressions

by Safana //basic
Choose variables and write expressions.
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## nachikets Variable Expressions

by Nachiket Karve //basic
Choose variables and write expressions.
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## Variable Expressions

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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• 2
• Critical Thinking

## Variable Expressions Discussion Questions

A list of student-submitted discussion questions for Variable Expressions.
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• Real World Application

## Planets

How long does it take for each planet to rotate around the sun in terms of the earth's rotation?
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• Real World Application

## Planets

How long does it take for each planet to rotate around the sun in terms of the earth's rotation?
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• Study Guide