Download or read book The Mental Calculator's Handbook written by Robert Fountain and published by Lulu.com. This book was released on 2013 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by two of the world's foremost authorities on mental calculation, The Mental Calculator's Handbook is essential reading for aspiring calculating prodigies. From multiplying fractions to extracting square roots, all the techniques are presented and explained in a clear and rigorous way.