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Elementary Number Sense/About Numbers Stars indicate
particularly interesting answers or good places to begin
browsing. Selected answers to common questions: Multiplying by
zero. Casting out nines. Number facts from the Web. - What is 0?
[5/21/1996] Is 0 a positive or a negative integer, or neither? -
What is a Number Base? [04/19/2003] The base eight number 7n3 is
equal to the base 7 number 1n35. What digit does n stand for? -
What is a Parenthesis? [07/17/2000] What does the mathematical
term "parenthesis" mean? - What is Expanded Notation?
[08/22/2001] My daughter was asked to rewrite each number as
expanded notation. What is expanded notation? - What is Number
Sense and How Can You Improve It? [08/29/2007] What does the
term 'number sense' refer to on standardized math test results?
Is there any way to increase your number sense? - Where Does Pi
Come From? [11/04/1996] If pi is a rati