# Working with Real Numbers

## Whole numbers, integers, rational numbers, and irrational numbers

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.
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## Evaluating Subtraction Expressions (One Variable Value Given) - Overview

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Overview
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## Evaluating Subtraction Expressions (Two Variable Values Given) - Overview

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## Evaluating Change - Overview

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## Evaluating Multiplication Expressions (One Variable Value Given) - Overview

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## Evaluating Multiplication Expressions (Two Variable Values Given) - Overview

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## Finding Multiplicative Inverses - Overview

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## Evaluating Division Expressions (One Variable Value Given) - Overview

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## Evaluating Division Expressions (Two Variable Values Given) - Overview

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## Graphing and Ordering Real Numbers - Overview

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## Evaluating Addition Expressions - Example 1

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Evaluating Addition Expressions Given Integer Variable Values
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## Evaluating Addition Expressions - Example 2

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Evaluating Addition Expressions Given Decimal Variable Values
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## Evaluating Addition Expressions - Example 3

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Evaluating Addition Expressions Given Fractional Variable Values
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## Evaluating Subtraction Expressions (One Variable Value Given) - Example 1

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Evaluating Subtraction Expressions Given One Integer Variable Value
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## Evaluating Subtraction Expressions (One Variable Value Given) - Example 2

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Evaluating Subtraction Expressions Given One Decimal Variable Value
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## Evaluating Subtraction Expressions (One Variable Value Given) - Example 3

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Evaluating Subtraction Expressions Given One Fractional Variable Value
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## Evaluating Subtraction Expressions (Two Variable Values Given) - Example 1

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Evaluating Subtraction Expressions Given Two Variable Values
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## Evaluating Subtraction Expressions (Two Variable Values Given) - Example 2

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Evaluating Subtraction Expressions Given Two Variable Values and Groupings
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## Evaluating Subtraction Expressions (Two Variable Values Given) - Example 3

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Evaluating Subtraction Expressions Given Two Variable Values and Absolute Values
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## Evaluating Change - Example 1

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Finding Change in Temperature or Elevation
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## Evaluating Multiplication Expressions (One Variable Value Given) - Example 1

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Evaluating Multiplication Expressions Given One Integer Variable Value
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## Evaluating Multiplication Expressions (One Variable Value Given) - Example 2

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Evaluating Multiplication Expressions Given One Decimal Variable Value
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## Evaluating Multiplication Expressions (One Variable Value Given) - Example 3

by CK-12 //basic
Evaluating Multiplication Expressions Given One Fractional Variable Value
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## Evaluating Multiplication Expressions (Two Variable Values Given) - Example 1

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Evaluating Multiplication Expressions Given Two Variable Values
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## Evaluating Multiplication Expressions (Two Variable Values Given) - Example 2

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Evaluating Multiplication Expressions Given Two Variable Values with Groupings
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## Evaluating Multiplication Expressions (Two Variable Values Given) - Example 3

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Evaluating Multiplication Expressions Given Two Variable Values and Absolute Values
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## Finding Multiplicative Inverses - Example 1

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Finding the Multiplicative Inverse of Positive Numbers
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## Finding Multiplicative Inverses - Example 2

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Finding the Multiplicative Inverse of Negative Numbers
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## Evaluating Division Expressions (One Variable Value Given) - Example 1

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Evaluating Division Expressions Given One Integer Variable Value
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## Evaluating Division Expressions (One Variable Value Given) - Example 2

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Evaluating Division Expressions Given One Decimal Variable Value
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## Evaluating Division Expressions (One Variable Value Given) - Example 3

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Evaluating Division Expressions Given One Fraction Variable Value
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## Evaluating Division Expressions (Two Variable Values Given) - Example 1

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Evaluating Division Expressions Given Two Variable Values
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## Classifying Numbers - Example 1

by CK-12 //basic
Identifying Numbers as Real, Rational, Irrational, Integer, or Whole
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## Graphing and Ordering Real Numbers - Example 1

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Graphing a Set of Real Numbers on a Number Line
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## Graphing and Ordering Real Numbers - Example 2

by CK-12 //basic
Ordering a Set of Real Numbers (ascending or descending)
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