The Trachtenberg Speed System of Basic Mathematics

The Trachtenberg Speed System of Basic Mathematics

by Jakow Trachtenberg
  • List Price: $25.95
  • ISBN-10: 4871877094
  • ISBN-13: 9784871877091
  • Edition: N/A
  • Type: Paperback
  • Publisher: Ishi Press

About The Book

The Trachtenberg Speed System of Basic Mathematics is a revolutionary system for calculating and teaching basic math. Children, who had repeatedly... Read more

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