Written by two of the world's foremost authorities on mental calculation, The Mental Calculator's Handbook is essential reading for aspiring calculating prodigi

No author has gone as far as Doerfler in covering methods of mental calculation beyond simple arithmetic. Even if you have no interest in competing with compute

Learn how to easily do quick mental math calculations Speed Math for Kids is your guide to becoming a math genius--even if you have struggled with math in the p

How does the brain represent number and make mathematical calculations? What underlies the development of numerical and mathematical abilities? What factors aff

Did you know that it's easier to add and subtract from left to right, rather than the other way round? And that you can be taught to square a three-digit number