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Abacus homework daniel-hromada ()


Abacus homework

  • Watch some videos about addition, subtraction and multiplication on an Abacus (e.g. https://www.youtube.com/watch?v=jwabVzlobZI)
  • You can validate the activity-credit for this course by:
    1. Teaching Your fellow students how to multiply 121 x 121 on an Abacus.
    2. Proposing the highest possible number which answers the question "How many distinct numbers can one unambiguously represent on an abacus with 10 marbles on 10 rows ?" and demonstrating why it is true.