Lot of People asked me to post others way to doing maths, like the previous post, so i've searched and found anothers tricks:
The first one it's usable to doing moltiplications with squared matrix (n x n)...
The other one explain how to do Cube roots of 9 digit numbers in your head.
The last one is a collection of Interactive maths projects using macromediaFlash.
Etichette: research