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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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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Paperback. Etat : new. Paperback. 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. This short book is a collection of simple and easily grasped tricks to speed up your mental arithmetic. It pays to master them as they will enable you to do calculations in your head without error, as with written calculations. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability. N° de réf. du vendeur 9782917260982
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