Imaginary Abacus - Instruction Book: A Mind Math Step-By-Step Guide to Addition and Subtraction Using an Imaginary Japanese Abacus (Soroban). by Paul Green
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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Paul Green
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Imaginary Abacus - Instruction Book: A Mind Math Step-By-Step Guide to Addition and Subtraction Using an Imaginary Japanese Abacus (Soroban).

Paul Green

missing page info Add in missing page information • first pub 2017 (view editions)

informative medium-paced
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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 abacu...

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