This video follows on from my previous video where I reviewed an exam from 1866. Finding the square root of a decimal number by hand is not so tricky once you learn this algorithm, but is a skill that is not often taught since we can do it so easily on a calculator these days. My previous video: https://youtu.be/KzJjlg3wvew
More about finding the square root: https://www.homeschoolmath.net/teaching/square-root-algorithm.php
I make videos about physics, math, astronomy and scientific beauty with a new episode every Wednesday and Sunday.