The 4,000 year old abacus might be ancient technology, but it can serve as a teaching tool for modern students. When operating the device, one learns decomposition — a way to think about pairs of ...
HAEBARU TOWN, Okinawa — A 6-year-old Japanese girl stood with her back to Defense Department students gathered Thursday to learn about the Japanese abacus, or soroban, at the Tsukazan Community Center ...
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