Items related to Trachtenberg speed mathematics self-taught
How long would it take you to multiply 5,132,437,201 times 452,736,502,785? Could you get the answer, 2,323,641,669,144,374,104,785, in seventy seconds? Can you divide 641,462 by 698 and come up with the correct answer, 919, in less than a minute? Can you add a column of twenty five-digit numbers in a few seconds, accurately, or find the square root of 364,728 in almost no time, without difficulty? YES-with the Trachtenberg Speed System of Basic Mathematics, you can. The late Jakow Trachtenberg, founder of the Mathematical Institute in Zurich, Switzerland, and originator of this special system for quick calculation of mathematical problems, believed firmly that everyone comes into the world with "phenomenal calculation possibilities". He had time to test his theory during seven years as a political prisoner in German concentration camps where, in order to keep his sanity, he put his ingenious mathematical mind to work developing a whole new world of numbers which would enable everyone, young and old, mathematically inclined or not, to calculate complex multiplication, division, addition, subtraction, and square root problems with speed and accuracy. The system is based on a series of simplified keys, and you can learn it if you can count to eleven. This workbook makes mastery of Trachtenberg mathematics easier than ever before.
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- PublisherDoubleday
- Publication date1975
- ISBN 10 0385061765
- ISBN 13 9780385061766
- BindingPaperback
- Number of pages216
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