Quantity: 63 available
The complete system of the Trachtenberg method of mathematics which makes possible high-speed arithmetical calculations with a remarkable degree of accuracy.
This method is not only speedy but simple. Once one has mastered the rules, lightning calculation is as easy as reading a story. It looks like magic, but the rules are based on sound logic.
Title: The Trachtenberg Speed System of Basic Mathematics
ISBN Number: 0313232008
ISBN Number 13: 9780313232008
Book Condition: New
Category: 1.00 Item
Seller ID: ING9780313232008
Description: 0313232008 Special order direct from the distributor