주산 코치
Android app by ysuk4097. Education · ysuk4097
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- Free to download
- In-app purchases
- Not listed in captured metadata
- Version
- 1.0.0
- Listing last refreshed
- 2026-09-17
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Store description excerpt
Abacus Coach is a learning app that doesn't just grade answers, but explains step-by-step the principles behind how the abacus beads work. You practice through 48 lessons, starting with the structure of the abacus and the representation of 0 through 9, and progressing to direct addition and subtraction, pairs of 5, complements of 10, double complements, and multi-row calculations involving two digits. Key Features • Digital abacus moved by tapping and dragging • 48 small-step addition and subtraction lessons • Hints on the principles of pairs of 5, complements of 10, and double complements • Feedback on errors regarding carrying, complements, digits, and calculation direction • Sequential learning based on 90% accuracy and no hints • Free abacus and number placement challenges • Introduction to Hosan, where you calculate by listening to voice prompts Master accurate movements before speed, and naturally transition to using a physical abacus and abacus-style mental arithmetic.
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