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Ready-reckoners

  • Dead Reckoningby Ronald W. Doerfler

    Taylor Trade Publishing 1993; US$ 16.99

    No author has gone as far as Doerfler in covering methods of mental calculation beyond simple arithmetic. Even if you have no interest in competing with computers you'll learn a great deal about number theory and the art of efficient computer programming. ?Martin Gardner more...

  • Speed Mathematicsby Bill Handley

    Wiley 2012; US$ 19.95

    This new, revised edition of the bestselling Speed Mathematics features new chapters on memorising numbers and general information, calculating statistics and compound interest, square roots, logarithms and easy trig calculations. Written so anyone can understand, this book teaches simple strategies that will enable readers to make lightning-quick... more...

  • Kaufmännisches Rechnen für Dummiesby Petra Leitert

    Wiley 2014; US$ 17.50

    Dreisatz, Prozentrechnen und Co. - wie ging das noch gleich? Wenn Sie einen kaufmännischen Beruf anstreben oder ausüben, führt kein Weg am Kaufmännischen Rechnen vorbei. Aber keine Sorge, auch wenn Sie kein Mathe-Genie sind, werden Berechnungen wie Proportions-, Durchschnitts-, Verteilungs- oder Zinsrechnung bald kein Problem mehr... more...

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