How do I use the traditional abacus collection?

Enter values, choose any options, then calculate to see results instantly.

Can I use it on mobile?

Yes—it's responsive and works on all modern devices.

Yes—free to use with no sign‑up.

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Master the Japanese soroban abacus with 1:4 bead configuration

Current Value

Hundred Trillions

Ten Trillions

Trillions

Hundred Billions

Ten Billions

Billions

Hundred Millions

Ten Millions

Millions

Hundred Thousands

Ten Thousands

Thousands

Hundreds

Tens

Ones

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Master 5-complements: 1↔4, 2↔3 for quick calculations

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Learn 10-complements: 7 = 10-3, so add 7 by carrying 1 and subtracting 3

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Use proper finger technique: thumb for lower beads, index for upper

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Practice visualization - "see" bead movements to develop mental math

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Start with simple addition before moving to complex operations

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