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.

Represent sums and differences on a number line and add and subtract rational numbers.
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• PLIX

## Addition of Rational Numbers: Baking with Butter

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• Video

## Adding and Subtracting Rational Numbers: A Sample Application

This video demonstrates a sample use of adding and subtracting rational numbers.
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• Video

## Adding and Subtracting Rational Numbers: An Explanation of the Concept

This video provides an explanation of the concept of adding and subtracting rational numbers.
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• 3
• Critical Thinking

## Addition of Rational Numbers Discussion Questions

A list of student-submitted discussion questions for Addition of Rational Numbers.
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• Real World Application