Dispelling some of the subject's alarming aspects, this book provides, in a witty and engaging style, the fundamentals of mathematical operations. Topics include system of tens and other number systems, symbols and commands, first steps in algebra and algebraic notation, common fractions and equations, irrational numbers, much more. 1958 edition.
Here's something that initially surprised me about having a quantitative job: the computers do the hard math but I have to be able to do the easier math. While I've never had to perform gradient descent with a pencil at work, I regularly need to reason about things like probabilities, combinations/permutations, and set operations on the fly, sometimes in realtime in meetings. I last took a pure math class in 2006, my coursework since then focused on statistics and applications. So it's handy from time to time to go back to basics and read something from the pre-computer era. I was happy to find this old book that covers a great deal of material in under 300 pages. A great refresher.