Parenthesis

Pronunciation: /pəˈrɛn θə sɪs/ ?

-- plural is parentheses

Parentheses are marks used to group operations.[1]

Parentheses are always used in pairs. The left parenthesis looks like: (. The right parenthesis looks like: ).

The parentheses are used to group operations in math. For example, the expression 5·4+2 evaluates to 22. Using the order of operations, we first multiply 5 and 4 to get 20, and then add 2 to get 22.

However, if we use parentheses to write the expression as 5·(4+2), the value of the expression changes. The parenthesis tells us to add 4 to 2 before multiplying by 5. Adding 4 and 2 gives us 6. When we then multiply by 5 we get 30.

References

  1. parenthesis. http://wordnet.princeton.edu/. WordNet. Princeton University. (Accessed: 2011-01-08). http://wordnetweb.princeton.edu/perl/webwn?s=parenthesis&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=.
  2. Keigwin, H. W.. Principles of Elementary Algebra, pg 4. Ginn & Company, 1886. (Accessed: 2010-01-12). http://www.archive.org/stream/principlesofelem00dupurich#page/4/mode/1up/search/parenthesis.
  3. Bettinger, Alvin K. and Englund, John A.. Algebra and Trigonometry, pg 17-18. International Textbook Company, January 1963. (Accessed: 2010-01-12). http://www.archive.org/stream/algebraandtrigon033520mbp#page/n18/mode/1up.

Cite this article as:


Parenthesis. 2009-12-23. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/p/parenthesis.html.

Translations

Image Credits

Revision History


2009-12-23: Added "References" (McAdams, David.)
2008-09-02: Added 'More Information' (McAdams, David.)
2007-07-12: Initial version (McAdams, David.)

All Math Words Encyclopedia is a service of Life is a Story Problem LLC.
Copyright © 2005-2011 Life is a Story Problem LLC. All rights reserved.
Creative Commons License This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License