Decimals

__Definitions__
See [|Animated Dictionary] for further definitions and visual aides.
 * A Decimal Number:** The numbers in the base 10 number system, having one or more places to the right of a decimal point.
 * Repeating Decimals:** A decimal in which the digits endlessly repeat a pattern.
 * Terminating Decimal:** A fraction whose decimal representation contains a finite number of digits.

Adding Decimals Subtracting Decimals Multiplying Decimals Dividing Decimals