17 of 18 people found the following review helpful
An Excellent book for all people in all walks of life,
By A Customer
This review is from: The Trachtenberg Speed System of Basic Mathematics (Paperback)
This book shows you a wonderful step by step method for improving mental calculations that you use everyday without realising. By learning the methods described your confidence in using mathematics will sky rocket. I cannot recommend this book highly enough.
(37 customer reviews)