Abacus Adventure
Master the Soroban — beads, place value, addition & subtraction!
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Learn
38 lessons: beads → place value → complements → add & subtract
Start →Practice
Free play + number, addition & subtraction drills
Start →Challenge
30 levels: set numbers, add & subtract on the abacus
Start →How to Play
- 1. Learn — 38 lessons: beads → digits → place value → friend beads → add & subtract → thousands
- 2. Practice — Free play or drills: set numbers, addition, subtraction (easy / medium / hard)
- 3. Challenge — 30 levels mixing set-number, addition & subtraction puzzles
Coins & Points: Start with 200 coins. New lessons cost 15 coins. Correct challenge answers earn coins + points; wrong answers lose 8 coins. Completed lessons replay for free.
- • Heaven bead DOWN = 5 | Earth beads UP = 1 each | Right rod = ones, left = higher places
- • স্বর্গ মনি নিচে = ৫ | পৃথিবী মনি উপরে = ১ | ডান রড = একক