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How to Calculate Quickly - Full Course in Speed Arithmetic

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January 06, 2014, 07:49:28 PM

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How to Calculate Quickly - Full Course in Speed ArithmeticPublisher: Dover Publications
Henry Sticker
1955
Language: English
ISBN-10: 048620295X
ISBN-13: 978-0486202952
192 pages
PDF
5.09 MBMany useful procedures explained and taught: two-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.

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