# decimal number system

 decimal number system noun a positional system of numeration that uses decimal digits and a base of ten [syn: decimal numeration system]
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decimal number system

in mathematics, positional numeral system employing 10 as the base and requiring 10 different numerals, the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. It also requires a dot (decimal point) to represent decimal fractions. In this scheme, the numerals used in denoting a number take different place values depending upon position. In a base-10 system the number 543.21 represents the sum (5102) + (4101) + (3100) + (2101) + (1102). See numerals and numeral systems.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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