Drexel dragonThe Math ForumDonate to the Math Forum

The Math Forum Internet Mathematics Library

The Definitive Four Fours Answer Key

_____________________________________
Library Home || Full Table of Contents || Suggest a Link || Library Help
_____________________________________

Visit this site: http://www.dwheeler.com/fourfours/
Author:David A. Wheeler
Description: From 0 up to 40,000, whole number mathematical expressions that use only common mathematical symbols and exactly four 4s. Wheeler offers his solutions in three different formats: an abbreviated list of answers; a text file of results, mathematical expressions, and their "impurity levels," to accommodate for variations in the operations allowed; and a downloadable PDF of all the above, plus discussion. See also Wheeler's article "When Adding and Multiplying are the Same" and discussion of weird bases, "Way Off Base."
Levels: Late Elem. (3-5), Middle School (6-8), High School (9-12)
Languages: English
Resource Types: Problems/Puzzles, Articles, Recreations
Math Topics: Basic Operations, Number Sense/About Numbers

[Privacy Policy] [Terms of Use]

_____________________________________
Home || The Math Library || Quick Reference || Search || Help
_____________________________________

© 1994-2013 Drexel University. All rights reserved.
http://mathforum.org/
 The Math Forum is a research and educational enterprise of the Goodwin College of Professional Studies.The Math Forum is a research and educational enterprise of the Drexel University School of Education.