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 Description  
 Real Numbers:  All the rational and irrational numbers; that is, all of the numbers that can be expressed as decimals.

There are many different ways we can classify numbers. In fact, many of the classifications are subsets of other classifications. The following are depictions of how the classifications relate.

 Natural Numbers

 Whole Numbers  Integers  Rationals  Irrationals

 Examples

 1, 2, 3, 4,

 0, 1, 2, 3, 4,

 , -3, -2, -1, 0, 1, 2, 3,

 -1/4, 6/5, 0.125, -3.272727

 , 2.345678

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 Opposites of natural numbers

 Fractions, repeating and terminating decimals

 non-terminating decimals

Together the rationals and irrationals form a larger set of numbers called the Real Numbers.