Math magic
Explore Math magic by Scott Flansburg: 3 Hacker News mentions from 3 participants in 2007-02-22–2026-11-01. Read original excerpts, compare opinions and save this book.
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Read on Hacker NewsYears ago, I enjoyed reading books about how to do arithmetic mentally and quickly (there are several of them - one good one is "Math Magic" by Scott Flansburg). There did not seem to be anything equivalent for more abstract math, i.e. algebra and calculus. For some reason, I cared so much that I actually took the trouble to write a couple of books about it ( http://hilomath.com/ ). To figure out what to write, I actually sat down with an old algebra text book, and while solving the problems in my head, very carefully observed what I did and how... then wrote down how it all worked, using words and images. This process was about a hundred times harder than it sounds; had I any clue how hard it would have been, I probably never would have started. Anyway, for doing abstract/symbolic math mentally, the method I came up with defines three le…
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