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32 simple tricks for quick mental calculations

by [Perelman, Yakov]

$13.43

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Description

This short book is a collection of simple and easily grasped tricks to speed up your mental arithmetic. If you want to master them you should realize that to be used fully they need to be approached conscientiously, not mechanically. But it pays to master them as they will enable you to do calculations in your head without error, as with written calculations.

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Product Details

  • Prodinnova Brand
  • Jan 26, 2019 Pub Date:
  • 9782917260982 ISBN-13:
  • 291726098X ISBN-10:
  • 18.0 pages Paperback
  • English Language
  • 9 in * 0.04 in * 6 in Dimensions:
  • 0 lb Weight: