""Speed And Fun With Figures"" by T. O'Conor Sloane is a comprehensive guide to mental arithmetic and mathematical tricks. The book is designed to help readers improve their ability to perform calculations quickly and accurately, and to have fun while doing it. The author provides a wide range of strategies, tips, and techniques for performing mental arithmetic, including shortcuts for addition, subtraction, multiplication, and division. The book also includes chapters on fractions, decimals, percentages, and algebra. In addition to its practical applications, ""Speed And Fun With Figures"" is also a fun and entertaining read, with puzzles, games, and trivia scattered throughout. Whether you are a student looking to improve your math skills, or simply someone who enjoys puzzles and mental challenges, this book is sure to provide hours of entertainment and education.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.
Thomas O'Conor Sloane was an American scientist, inventor, author, editor, educator and linguist, perhaps best known for writing The Standard Electrical Dictionary and as the editor of Scientific American, from 1886 to 1896 and the first science fiction magazine, Amazing Stories, from 1929 to 1938. (source: Wikipedia)
This was a recommendation from a Canadian website devoted to slide rules. The book is actually a collection of three titles: I got a cool old slide rule (ca 1924) and this book is one of the standard texts for learning how to drive the thing. I love the old typeface, patent-style illustrations, and settings of mathematical expressions. The text is pretty clear and interesting.