Jakow Trachtenberg
4shared.com (8,8 Mb)
scribd.com
epub - 4,5 Mb - link
djvu - link
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.
scribd.com
epub - 4,5 Mb - link
djvu - link
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.
Sem comentários:
Enviar um comentário