{"product_id":"imaginary-abacus-instruction-book-a-mind-math-step-by-step-guide-to-addition-and-subtraction-using-an-imaginary-japanese-abacus-soroban-9781978043497","title":"Imaginary Abacus - Instruction book: A mind math step-by-step guide to addition and subtraction using an imaginary Japanese abacus (Soroban).","description":"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.\u003cbr\u003e","brand":"Createspace Independent Publishing Platform","offers":[{"title":"Default Title","offer_id":50857521021202,"sku":"9781978043497","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_ab062132-6099-4923-abe0-78bcf89a9681.jpg?v=1737533626","url":"https:\/\/surprise-castle.myshopify.com\/products\/imaginary-abacus-instruction-book-a-mind-math-step-by-step-guide-to-addition-and-subtraction-using-an-imaginary-japanese-abacus-soroban-9781978043497","provider":"Surprise Castle","version":"1.0","type":"link"}