# Operations with Real Numbers

## Add, subtract, multiply, and divide 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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## Subtracting Integers - Overview

by CK-12 //basic
Overview
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## Subtracting Decimal Numbers - Overview

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Overview
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## Multiplying Decimal Numbers - Overview

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Overview
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## Dividing Integers - Overview

by CK-12 //basic
Overview
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## Operations and Conversions with Units - Overview

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Overview
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• Video

## Adding Integers - Example 1

by CK-12 //basic
Adding Two Integers Using the Number Line
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## Adding Integers - Example 2

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## Adding Decimal Numbers - Example 1

by CK-12 //basic
Adding Two Decimal Numbers with Same Signs
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## Adding Decimal Numbers - Example 2

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Adding Two Decimal Numbers with Different Signs
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## Adding Decimal Numbers - Example 3

by CK-12 //basic
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## Subtracting Integers - Example 1

by CK-12 //basic
Subtracting Two Integers Using the Number Line
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## Subtracting Integers - Example 2

by CK-12 //basic
Subtracting Three Integers
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## Subtracting Decimal Numbers - Example 1

by CK-12 //basic
Subtracting Two Decimal Numbers
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## Subtracting Decimal Numbers - Example 2

by CK-12 //basic
Subtracting Three Decimal Numbers
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## Multiplying Integers - Example 1

by CK-12 //basic
Multiplying Two Integers
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## Multiplying Integers - Example 2

by CK-12 //basic
Multiplying Three Integers
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## Multiplying Decimal Numbers - Example 1

by CK-12 //basic
Multiplying Two Decimal Numbers
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## Multiplying Decimal Numbers - Example 2

by CK-12 //basic
Multiplying Three Decimal Numbers
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## Dividing Integers - Example 1

by CK-12 //basic
Dividing Two Integers
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## Dividing Integers - Example 2

by CK-12 //basic
Dividing Three Integers
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## Dividing Decimals - Example 1

by CK-12 //basic
Dividing Two Decimal Numbers
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## Dividing Decimals - Example 2

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Dividing Three Decimal Numbers
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## Operations and Conversions with Units - Example 1

by CK-12 //basic
Solving Problems Involving Unit Analysis
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## Operations and Conversions with Units - Example 2

by CK-12 //basic
Converting Measurements to the Desired Units
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## Operations and Conversions with Units - Example 3

by CK-12 //basic
Converting Rates to the Desired Units
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## Operations and Conversions with Units - Example 4

by CK-12 //basic
Solving Word Problems Involving Rates
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