Imaginary Abacus - Instruction Book: A Mind Math Step-By-step Guide To Addition And Subtraction Using An Imaginary Japanese Abacus (Soroban). -..
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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 abacus.This 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.
| ISBN | 9781978043497 |
| Autor(a) | Green, Paul |
| Editora | Createspace |
| Ano de edição | 2017 |
| Páginas | 102 |
| Acabamento | Brochura |
| Dimensões | 27,90 X 21,60 |
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