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 Description  
 Whole Numbers:  The set of numbers 0, 1, 2, 3, 4,.

Note that this set differs from the natural numbers by including 0.

There are many different ways we can classify numbers. In fact, many of the classifications are subsets of other classifications. For example, the set of natural numbers differ from the set of whole numbers by excluding 0. Therefore, the set of natural numbers is a subset of the set of whole numbers.

The following table gives 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...

 What's new

 

 0

 Opposites of natural numbers

 Fractions, repeating and terminating decimals

 non-terminating decimals

Together the rational and irrational numbers form a larger set of numbers called the Real Numbers.