Imaginary Abacus - Instruction book: A mind math step-by-step guide to addition and subtraction using an imaginary Japanese abacus (Soroban).

Imaginary Abacus - Instruction book: A mind math step-by-step guide to addition and subtraction using an imaginary Japanese abacus (Soroban).

$29.90

$29.90 Sale

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.

Paperback: 100 pages

Publisher: CreateSpace Independent Publishing Platform; 2 edition (October 15 2017)

Language: English

ISBN-10: 197804349X

ISBN-13: 978-1978043497

Product Dimensions: 8.5 x 0.2 x 11 inches

Shipping Weight: 11.2 ounces

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