Difference between revisions of "Types of Number"
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Revision as of 14:22, 20 September 2017
Contents
Natural Numbers
A positive whole number including zero. Represented as N = (0,1,2,3,4 ....)
Integer Numbers
Any positive or negative whole number including zero. Represented as Z = (...,-2,-1,0,1,2,...)
Rational Numbers
A number that can be expressed as a fraction or ratio. An example of this is 8 or even 1/8. Represented as Q
Irrational Numbers
A number that cannot be represented as a fraction or ratio, the decimal form will contain infinite repeating values. An example of this is √7 because it cannot be simplified.
Real Numbers
Any positive or negative number with or without a fractional part.
Ordinal Numbers
A number used to identify the relative position of one number to another. Unlike the other types of numbers it does not have a representative symbol. An example of this would be 1st, 2nd, 3rd.
Cardinal Numbers
A number used to identify the size of something.
Real Algebraic
The real subset of the algebraic numbers: the real roots of polynomials. Real algebraic numbers may be rational or irrational. √2 = 1.41421... is irrational. Irrational decimal expansions neither end nor repeat. Represented as AR