Whats the fastest way to find square root of numbers without a calculator

Question

LIKE SQUARE ROOTS OF DECIMALS AND NUMBERS LIKE 2, 5. 8 ECT.JUST WITH PENCIL AND PAPER.

Answer 1

Telling you how to calculate a square root by hand is too complicated for a forum such as this. The method I know is under the 4th reference link near the bottom of the page called "Longhand Square Roots " where they have done a better job of explaining than I could here.