Psychological calculation contest (Xinhua) Updated: 2006-05-27 16:30
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More than 400 young children compete in a psychological calculation contest
in Liu Zhou of South China's Guang Xi Province May 27, 2006. Developed from the
traditional means of calculation with abacus, psychological calculation is to
use an abacus mentally and taught to develop children's intelligence.
[Xinhua]
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