Real number system

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Pre-Calculus

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1

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irrational

real but not expressible as the quotient of two integers (cant be written as a fraction)

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rational

capable of being expressed as a quotient of integers

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real number

any rational or irrational number

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integer

any of the natural numbers or zero

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natural number

the number 1 and any other number obtained by adding 1 to it repeatedly

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Whole number

All positive + 0 (no fractions/decimals) ex. 0,1,2,3,4,5,....