Learn abacus from scratch with this educational app. It offers clear explanations for beginners, including visual aids for adding and removing beads. Advanced users can test their skills in challenge modes.
そろばん問題集 by takeshi inoue



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Learn abacus from scratch with this educational app. It offers clear explanations for beginners, including visual aids for adding and removing beads. Advanced users can test their skills in challenge modes.



Practice mental arithmetic with this educational app. Review your calculation process, and easily re-challenge mistaken problems from your past logs. Upgrade to save more calculation history.