Mental calculations and estimations are basic, everyday skills that are essential for real-life arithmetic operations and number sense. This book presents a muc

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

These simple math secrets and tricks will forever change how you look at the world of numbers. Secrets of Mental Math will have you thinking like a math genius

"A multimedia professional learning resource"--Cover.

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