How to Calculate Quickly: Full Course in Speed Arithmetic

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How to Calculate Quickly: Full Course in Speed Arithmetic - Sticker, Henry

Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8,000 problems, with solutions. 1945 edition.

How to Calculate Quickly: Full Course in Speed Arithmetic 2012, WWW.Snowballpublishing.com

ISBN-13: 9781607964209

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How to Calculate Quickly: Full Course in Speed Arithmetic 1955, Dover Publications, Mineola, NY

ISBN-13: 9780486202952

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