On 2003-04-08 Peeter Pirn, Fort Wayne, IN USA wrote: Kojima´s book is short, but teaches nearly everything you need to add, subtract, multiply, and divide on the Japanese soroban. Missing is how to handle negative numbers when adding and subtracting. (Perhaps this is covered in Kojima´s advanced book.) The other review is correct to say that what Kojima teaches can be applied to the Chinese suan pan. The exercises are a valuable part of the book. Mental calculation is presented, but the use of ´abacus thinking´ for paper calculations is absent. It would be nice to see this book in print again.. And summed up by saying Short and Sweet. Currently Japanese Abacus : Its Use and Theory has an overall rating of 8 over 10.
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