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32 simple tricks for quick mental calculations
Indigo
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32 simple tricks for quick mental calculations
By None
Current price: $11.95


By None
32 simple tricks for quick mental calculations
Current price: $11.95
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Size: Paperback
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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. 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.


















