Imaginärer Abakus - Anleitungsbuch: Eine Mind Math Schritt-für-Schritt-Anleitung zum Hinzufügen...
Imaginary Abacus - Instruction Book : A Mind Math Step-by-step Guide to Addition and Subtraction Using an Imaginary Japanese Abacus, Paperback by Green, Paul, ISBN 197804349X, ISBN-13 9781978043497, Like New Used, Free shipping in the US Learn to add and subtract in your head by imagining an abacus to calculate the result. Example: Learn to calculate 415-350+233-155+44 quickly, just by imagining an book will teach you the skills required to firstly use the actual abacus effectively, then how to use an imaginary abacus (also known as a mental abacus).To follow this book you will need:1) A Japanese abacus (with at least 13 columns).2) The accompanying workbook 'Imaginary Abacus - Workbook’ (sold separately). This useful and impressive skill would be an asset for anyone.
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