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Secrets of the Japanese abacus (soroban step by step)
This book will accompany you in your training trip, so that you can be a successful trainee and also a teacher for others, through the stages
you'll find illustrated with explanations and also practical exercises for
each stage. So what you have to do is following the stages step by step
without running, applying each exercise to train and test your
.understanding of each explanation
Welcome to Soroban World!