The Trachtenberg Speed System of Basic Mathematics |
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| Author:
| Trachtenberg, Jakob |
| ISBN: | 978-0-285-63995-9 |
| Publication Date: | Jan 2011 |
| Publisher: | Souvenir Press Limited
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| Book Format: | Ebook |
| List Price: | Contact Supplier contact
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Book Description:
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Jakow Trachtenberg believed that everyone is born with phenomenal abilities to calculate, he devised a set of rules that allows every child to make multiplication, division, addition, subtraction and square-root calculations with unerring accuracy and at remarkable speed.
Jakow Trachtenberg believed that everyone is born with phenomenal abilities to calculate, he devised a set of rules that allows every child to make multiplication, division, addition, subtraction and square-root calculations with unerring accuracy and at remarkable speed.