Learn to do Math With Soroban a Japanese Abacus: Learn how to add, subtract, multiply, divide and find square roots with this easy to use instruction guide.

I'm an adult learner and this book is straightforward without being too cutesy and child-centered.

Hands down this is the best book I own on soroban. All operations are explained with easy to understand explanations and illustrations. Explanations for multiplication and division is very well written and I was able to make sense of the steps. Instead of labeling the rods as A, B, C, D, etc. book explains in detail why, where and which rod to choose to register answers. These explanation made so much sense to me. Illustrations make it so much more easy to follow the steps and learning has been fun and joyful. I am very glad to know how to add and subtract negative numbers. This is the most valuable addition to my collection of books on soroban. This books speaks to me. PERFECT! Well done SAI Speed Math Academy, thank you very much!

This is an excellent book, which makes learning soroban pretty easy. My only quibble is that it does not tell you how much you should practice, and there is only 1 page at the very end which discusses "mental abacus". But lots of practice problems, and an intuitive design and good diagrams. I wish it would tell me how to train, what to train on, to become proficient at "mental abacus". But this book only has clear instruction on how to do the operations, not how much to train or how to get there. This book is MUCH better than the old Kojima book, which was quite confusing.

If I could have only one book on the soroban - this would be it. It covers everything - adding, subtracting, multiplying, dividing, squaring and negative numbers with detailed illustrated and written instructions that are easy to understand and follow. Plus there are hundreds of practice problems - with the answers in the back. This is by far, the best book on how to use the soroban I have seen. Thank you SAI Speed Math Academy.

This book is incredible. My sons knowledge on mental math is improving rapidly!!!

Great book. It was easy to understand. It covers addition and subtraction, multiplication and division, decimals, and commas.

Love the explanations and the fact that it teaches adding, subtracting, multiplication, and division. Wish it had a few more problems for each.

Well graded with exhaustive exercises for self-instruction. Explanations are a bit long-winded, but, otherwise, a very good resource.

The book and abacus have arrived on time thank you Amazon for making my Self- Study hobby possible!

Se ci fosse una collana intitolata "libri che insegnano a fare le cose male" questo libro ne farebbe parte a pieno. Chi è interessato ad apprendere come usare il soroban scarichi da internet i due libri di Kojima. Questo libro sembra scritto da qualcuno che si è letto Kojima capendone però poco. Usare il soroban non è difficile ma c'è bisogno di essere metodici e sistematici, tutte cose che il sistema insegnato in questo libro non è. Esempi: Se si deve sulla stessa colonna innalzare la pietra superiore e abbassare una o più pietre inferiori quale delle due operazioni deve essere fatta prima? Kojima lo dice e ne spiega il motivo, questo libro no. Come essere sistematici con simili lacune? Nell'addizioni e nelle sottrazioni quando si agisce su più colonne tramite i complementi si effettua prima la sottrazione o l'addizione? Qui viene insegnato,in tale frangente, ad operare da sinistra a destra ma questo crea problemi in addizioni del tipo 999+1. Invece tutto fila semplice con il metodo insegnato da Kojima. Che dire poi dei metodi insegnati per operare con i numeri negativi? La confusione più totale. Se volete imparare ad usare l'abaco giapponese leggete manuali scritti da giapponesi come quelli di Kojima, lasciate perdere questo libro che vi dà solo l'impressione di imparare il metodo giusto.

Very comprehensive guide to learning how to use the Soroban.