
 Number 
  Numbers should be distinguished from numerals, which are (combinations of) symbols used to represent numbers. 
  Many languages have the concept of grammatical number, an attribute of certain words and phrases that affects their syntactic usage and meaning. 
  (For the finite case, the ordinal and cardinal numbers are equivalent; they diverge in the infinite case.) The arithmetical operations of numbers, such as addition, subtraction, multiplication and division, are generalized in the branch of mathematics called abstract algebra; one obtains the groupss, ringss and fieldss. 
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