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<a accesskey="3" href="page.php?w=operation_%28mathematics%29&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=mathematics">mathematics</a>, an <b>operation</b> is a <a href="page.php?w=Function_%28mathematics%29">function</a> that takes as input a fixed number of elements of a <a href="page.php?w=Set_%28mathematics%29">set</a> and returns an element of the same set. For example, addition on <a href="page.php?w=Real_number">real numbers</a> is an operation that accepts two real numbers and returns a real number. In general, the input values may be called "<a href="page.php?w=operand">operand</a>s" or "arguments".  The number of</p><p>
<a accesskey="3" href="page.php?w=operation_%28mathematics%29&amp;p=2">3.Next</a>
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