Added: 4 years ago
From: kwebmarketing
Views: 3,503
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  • single digit multiplication and addition...that's pretty slow

  • the question are easy i dont even need to do the abacus.

  • Compared to all the other abacuses, this one is really slow and the queastions are easy... (many inexperienced people who use other abacuses are at the same speed)

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