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| | Arithmetic (Site not responding. Last check: 2007-10-24) |
 | | Arithmetic is a branch of (or the forerunner of) mathematics which records elementary properties of certain operations on numeral s. |
 | | The traditional arithmetic operations are addition, subtraction, multiplication and division, although more advanced operations (such as manipulations of percentages, square root, exponentiation, and logarithmic functions) are also sometimes included in this subject. |
 | | The arithmetic of natural number s, integer s, rational number s (in the form of fraction s), and real number s (using the decimal place-value system known as algorism) is typically studied by schoolchildren, who learn manual algorithms for arithmetic. |
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