Pronunciation: /ɪˈvæl yuˌeɪt/ ?

To evaluate an expression, values are substituted for variables, and the expression is simplified.[1]

Example 1
Evaluate 3 + 2x when x = 5.
3 + 2·5Use the substitution property of equality to substitute 5 for x
3 + 10Simplify the multiplication. 2·5 = 10.
13Simplify the addition. 3 + 10 = 13.


  1. evaluate. http://wordnet.princeton.edu/. WordNet. Princeton University. (Accessed: 2011-01-08). http://wordnetweb.princeton.edu/perl/webwn?s=evaluate&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=.
  2. Wentworth, George; Smith, David Eugene; Harper, Herbert Druery. Fundamentals of practical mathematics, pg 74. Ginn and Company, 1922. (Accessed: 2010-02-01). http://www.archive.org/stream/fundamentalsofpr00wentuoft#page/74/mode/1up/search/evaluate.

Printed Resources

Cite this article as:

Evaluate. 2010-01-31. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/e/evaluate.html.


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Revision History

2010-01-31: Added "References" (McAdams, David.)
2009-02-10: Expanded descriptions in example (McAdams, David.)
2008-07-28: Added vocabulary links (McAdams, David.)
2007-08-08: Initial version (McAdams, David.)

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