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Loading... How to Calculate Quickly: Full Course in Speed Arithmetic| 66 | 1 | 58,482 |
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Amazon.com Book Description (ISBN 048620295X, Paperback)
Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful short cuts. More than 8,000 problems, with solutions. 1945 edition.
(retrieved from Amazon Mon, 19 Nov 2007 03:58:11 -0500)
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