# Real Numbers

## Real numbers account for any given number, including integers, rational numbers, and irrational numbers. Learn more about real numbers with our modules below.

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.

## Order of Real Numbers

by CK-12 //basic
Learn how to classify, order, and graph real numbers.
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• Video

## Determining Classifications for Real Numbers - Overview

by CK-12 //basic
Overview
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57
• Video

## Ordering Real Numbers - Overview

by CK-12 //basic
Overview
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18
• Video

## Integers - Example 1

by CK-12 //basic
Graphing and Comparing Integers on the Number Line
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8
• Video

## Classifying and Ordering Numbers - Example 1

by CK-12 //basic
Classifying Numbers as Whole, Integer, or Rational
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6
• Video

## Determining Classifications for Real Numbers - Example 1

by CK-12 //basic
Selecting the Correct Classification for Real Numbers
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9
• Video

## Ordering Real Numbers - Example 1

by CK-12 //basic
Ordering a Set of Real Numbers
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6
• Video

## Square Roots and Real Numbers

by CK-12 //basic
Learn what a rational number is.
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2
• Real World Application

## It's Elementary!

by CK-12 //basic
Learn why the order of numbers is critical for the periodic table.
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