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Books
Mathe-Magie
Verblüffende Tricks Für Blitzschnelles Kopfrechnen Und Ein Phänomenales Zahlengedächtnis »
Verblüffende Tricks Für Blitzschnelles Kopfrechnen Und Ein Phänomenales Zahlengedächtnis »
Secrets of Mental Math
From a renowned Mathemagician, a fun, accessible, and comprehensive guide to the simple techniques of doing quick caclulations in your head, including additi... »
From a renowned Mathemagician, a fun, accessible, and comprehensive guide to the simple techniques of doing quick caclulations in your head, including additi... »
