Section 4.3 Reference Topics

Math League's integer site:
http://www.mathleague.com/help/integers/integers.htm#multiplyingintegers

Mrs. Glosser's Math Goodies,TM
This site gives worksheets, exposition, and other practice, but would like to sell you a CD.
http://www.mathgoodies.com/lessons/toc_vol5.shtm

Fibonacci numbers to represent integers
An interesting enrichment site which used Fibonacci numbers as a base to a numeration system representing integers.
http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibrep.html

Links