32 simple tricks for quick mental calculations - Couverture souple

Perelman, Yakov

 
9782917260982: 32 simple tricks for quick mental calculations

Synopsis

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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À propos de l?auteur

Yakov Perelman (1882-1942) was a Russian and Soviet science writer and author of many popular science books. He has been known by his popular, witty and quite scientific works on physics, astronomy and mathematics, which are, moreover written in a marvelous language and are very readable.

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