11-07-2009, 02:57 PM
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|  How to Calculate Quickly  How to Calculate Quickly  How to Calculate Quickly  Author:Henry Sticker | Publisher: Dover Publications Inc. | Year: 1955 | Pages:185 | Size:11.91 MB About the book Arithmetic is a science, but calculation is an art. Science is knowledge-art is skill. You have all the knowledge you could possibly need to determine that 57 times 25 equals 1425, but if you are asked to multiply 57 by 25 and cannot do this mentally in just one second, you are not adept at the art of calculation. Genuine skill in the calculating art can be acquired by any person of ordinary intelligence, no matter what his schooling may have been. To develop such skill is the purpose of this book. Special forms of short, graded exercises, performed for the most part mentally, lead the student by easy steps to a point where he will possess really exceptional calculating ability.   One link Direct Download: How to Calculate Quickly |
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