Kids doing hand-abacus math tricks - GIF and video

Kids doing hand-abacus math tricks. Kinda gimmicky, like the math equivalent of spelling bees or Rubik's cube solving. Still interesting.

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Apparently India focuses very strongly on rote learning. This is one explanation I've heard for why Indian kids perform so well in American spelling bees. 3:59 video:
https://www.youtube.com/watch?v=FgFEckm-rRA


Previously:

https://www.homemadetools.net/forum/...240#post116051