This app is designed for serious practice of abacus calculation and mental abacus. It offers automatic scoring and re-presents incorrect problems for efficient learning. Practice with problems used by over 100 million people, covering all levels from beginner to advanced.
そろばん暗算の計算なら そろばんDANQ by Oriens, Inc.
Editor's Choice
📚 Education
3.0(1 ratings)
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