tontonan
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Indian Abacus competition
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Impossible Challenge: Teenagers mentally calculate 100 3-digit numbers in seconds
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learning to count on an abacus👍👍👍 #kid #abacus #study #funny
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ABACUS Level 2 | Addition & Subtraction Video | Saksham Abacus Academy #maths #school #kids #shorts
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Neuroakrobatyka z K2Kids 🙌 #mentalarithmetic #soroban #arytmetykamentalna
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Kids playing with abacus maths game whilst waiting for the dentist
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Word abacus world record
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Abacus Rules for Beginners
