RECOMMENDED BOTH FOR BEGINNERS AS FOR ADVANCED CALCULATORS!

Robert Fountain and Jan van Koningsveld: The Mental Calculator's Handbook

written by two of the best calculators (both have won multiple titles at the Mental Calculation World Cup)

Easy to read for motivated beginners even without too much mathematical knowledge - but advanced calculators should also find something new and useful. The calculating procedures are clearly explained, and the book contains several examples and exercises.

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