Zen mode

Take a step back and have fun with our classic abacus.

• Background music
• Abacus without digital counter
• No computer assistance

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Tutorial mode

Follow our step-by-step interactive tutorial to learn how to do basic arithmetic operations with an abacus.

• Addition and subtraction supported
• Auto-fill abacus feature
• Integer overflow detection

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Rush mode

Solve as many arithmetic problems as possible in 2 minutes.

• Abacus with digital counter
• No computer assistance

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