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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

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

Choose variables and write expressions.
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## Variable Expressions Quiz

Quiz for Variable Expressions.
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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