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The Trachtenberg Speed System Of Basic Mathematics by Ann Cutler, Hardcover | Indigo Chapters
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The Trachtenberg Speed System Of Basic Mathematics by Ann Cutler, Hardcover | Indigo Chapters
From Ann Cutler
Current price: $136.27
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Size: 0.63 x 8.5 x 1.021
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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. | The Trachtenberg Speed System Of Basic Mathematics by Ann Cutler, Hardcover | Indigo Chapters
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