ynnad

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About me: 

mental calculation level: 1. Kyu

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Germany

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Member for
1 year 8 months

Latest Posts and Comments

Title Type Comments Updated
Soroban - can I use my left hand? Forum topic 2 1 month 18 hours ago
trigonometric functions Forum topic 0 7 months 3 weeks ago
does the abacus have a real advantage ? Forum topic 7 1 month 1 week ago
Square Roots... Perfect, Irrational, Estimating Forum topic 18 1 year 5 months ago