I found these websites that have mental math tips.http://listverse.com/science/10-easy-arithmetic-tricks/
Last edited by infinitebrain (2008-07-10 04:21:28)
The best thing about life is you don't know what to expect
thanks for you sharing. i like the mental multiplication very much.
Is it really that funny ey? to look down on people, smurking? adult people lurking around, smurking...
I see clearly now, the universe have the black dots, Thus I am on my way of inventing this remedy...