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Ready-reckoners

  • 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...

  • Speed Mathematicsby Bill Handley

    Wiley 2012; US$ 19.95

    Based in Melbourne, Bill Handly is recognized as an authority of mathematics and study methods in Australia and overseas. His methods of teaching maths, learning and thinking strategies have achieved astonishing results in schools worldwide. more...

  • 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...

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