Doing Simple Math in Your Head - Howard, W J

Easy-to-learn techniques for solving math problems quickly without pencil and paper or calculator. A Book- of-the-Month Club Selection.

Doing Simple Math in Your Head 2002, BPI (India) PVT Ltd, Mumbai

ISBN-13: 9788186982624

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Doing Simple Math in Your Head 2001, Chicago Review Press, Chicago, IL

ISBN-13: 9781556524233

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Doing Simple Math in Your Head 1992, Coast Pub.

ISBN-13: 9780962734151

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