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Abacus Mental Math Demonstration - Strengthen Math Facts, Improve Focus, Concentration & Memory
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Japan's ancient secret to better cognitive memory - BBC REEL
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FLASH ANZAN
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SoCal Soroban Contest Part 1
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Learn to use the abacus(soroban), the Japanese way - Part 1
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American Math teacher VS Japanese School girls
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Impossible Challenge: Teenagers mentally calculate 100 3-digit numbers in seconds
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UCMAS Students Calculating One Digit 20 Rows - Demo Video
