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Order of Operations
This is a very good all around site the math
help. The link provided here is for the order of operations.
http://www.sosmath.com/algebra/fraction/frac3/frac39/frac39.html
Algebra help Simplifying using the Distributive Property
http://www.algebrahelp.com/lessons/simplifying/distribution
Math help
One of the best all around sites for math help, covering a variety of
topics, is operated out of Swarthmore and is called Ask Dr. Math.
The link here is for the distributive property.
http://mathforum.org/dr.math/faq/faq.property.glossary.html
All About Estimation and Rounding
This site teaches estimation
and rounding skills, along with some interactive practice.
http://www.aaamath.com/est.html
Calculators
There are many places on the web where you can purchase
a calculator. One common place (and the author has no financial interest
here) is Amazon.com
http://www.amazon.com/exec/obidos/tg/browse/-/172523/104-2777238-8145502.
George Polya
Did you notice the Historical Perspective at the beginning
of this section? If you want some additional information, you can check
out this site.
http://www-history.mcs.st-and.ac.uk/~history/Mathematicians/Polya.html
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