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__Whole Numbers: __numbers 0, 1, 2, 3, 4......

__Integers:__ numbers ....-3, -2, -1, 0, 1, 2, 3....

-Positive Integers: integers that are greater than 0 (1, 2, 3...)

** **-Negative Integers: integers that are less than 0 (-1, -2, -3...)

-The integer 0 is neither negative or positive

__Rational Numbers: __a number a/b where a and b are integers and b is not equal to 0. For example: (-1/2) is a rational number because it can be written as (1/-2), as well. When you divide rational numbers your decimal expansion will repeat or end (0.5, 0, .1313...)

__Irrational Numbers:__ numbers whose decimal expansions never repeat. Examples: 1.414213562373...(sqrt(2)) or 3.141592653589...(pi)

Real Numbers include:

-all whole numbers

-rational numbers

-irrational numbers

Real Numbers DO NOT include:

-imaginary numbers such as sqrt(-1)

-infinity