Question 625678
1.Why is -12 not a whole number?


The set of whole numbers is the set {0, 1, 2, 3, 4, 5, ...}


Basically a whole number is either 0 or it is a positive number with no fraction or decimal part. 


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2.Why is there a need for negative numbers?


Negative numbers are useful for a lot of things. Examples include representing debt, showing relative position, and relative time.


Ex: -2 might represent $2 of debt.


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3.What numbers are not classified as integers?


Fractions such as 1/2 or 6/11 are not integers because they are not whole numbers. 


Also, numbers such as {{{sqrt(2)}}} or {{{pi}}} aren't considered integers either for the same reason. These numbers are irrational numbers.

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