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What's a Real Number?

Note:

Real numbers are numbers that can be found on the number line. This includes both the rational and irrational numbers. This tutorial explains real numbers and gives some great examples. Take a look!

Keywords:

  • definition
  • real number
  • rational
  • irrational
  • number lines

Background Tutorials

  • Sets and Number Lines

  • Types of Numbers

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        What's a Rational Number?

      What's a Rational Number?

      There are lots of different kind of numbers that you should know about, and that includes rational numbers. Check out the tutorial!

  • Square Roots

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        How Do You Estimate the Square Root of a Non-Perfect Square?

      How Do You Estimate the Square Root of a Non-Perfect Square?

      Trying to take the square root of a number that is not a perfect square? Think you need a calculator? Think again! This tutorial will show you how to estimate the square root of a number that is not a perfect square without the use of a calculator!

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        What's a Perfect Square?

      What's a Perfect Square?

      Anytime you square an integer, the result is a perfect square! The numbers 4, 9, 16, and 25 are just a few perfect squares, but there are infinitely more! Check out this tutorial, and then see if you can find some more perfect squares!

Further Exploration

  • Types of Numbers

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        What are Natural and Whole Numbers?

      What are Natural and Whole Numbers?

      The natural numbers are also called the counting numbers. The whole numbers are almost exactly as the natural numbers the same except for one small difference! Watch this tutorial and learn the difference between natural and whole numbers.