
 Decimal (Site not responding. Last check: 20071106) 
  Decimal, also called denary, is the base 10 numeral system, which uses the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 (called digits) together with the decimal point and the sign symbols + (plus) and − (minus) to represent numbers. 
  Computers internally almost always use another numeral system, binary, because it is hugely more efficient to implement this system electronically. 
  Decimal fractions are usually expressed without a denominator, the decimal point being inserted into the numerator at a position corresponding to the power of ten of the denominator. 
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