1x.com - Milky Way arched Night by Pignotti Maurizio
1x is an online photo gallery and social network. What makes 1x different is that every photo displayed has been hand picked by a curator.
How to Calculate a Square Root by Hand
There are several ways to calculate the square root of a number by hand. While some methods will only give you an approximation, this method calculates the square root digit by digit using only simple operations.