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version 1.3, 2003/05/29 20:30:51	version 1.4, 2013/07/05 18:30:40
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\label{Tolerance}	\label{Tolerance}
A \textbf{tolerance\index{tolerance}} parameter determines how closely	A \textbf{tolerance\index{tolerance}} parameter determines how closely
the system will require the student's answer to be in order to count it correct.	the system will require the student's answer to be in order to count it correct.
	The tolerance parameter should always be defined for a numerical problem.

For technical reasons, it is almost never a good idea to set this parameter	For technical reasons, it is almost never a good idea to set this parameter
to zero. Computers can only approximate computations involving real numbers. For instance,	to zero. Computers can only approximate computations involving real numbers. For instance,