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

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

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

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