maths for kids

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1. http://www.mathsisfun.com/whole-numbers.html
2. http://www.mathgoodies.com/lessons/vol5/intro_integers.html
3. http://en.wikipedia.org/wiki/Integer
4. http://www.mathsteacher.com.au/year8/ch03_integers/02_integer/int.htm
5. http://www.youtube.com/watch?v=27CJH60xwuA