Japanese kids who spend years practicing the old wooden style abacus calculators are able to imagine using it and do massive calculations without it le maîtreJune 1, 2019All Post navigation PreviousNext https://youtu.be/6m6s-ulE6LY?t=54 http://bit.ly/2IbAuUI Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related
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