The Maya Abacus

The Mesoamerican abacus is called a “Nepohualtzintzin.” The arrangement of the Maya Abacus, or Nepohualtzintzin, is with seven beads (or balls or cacao beans) of two colors per level.  Four of the beads are of one color, representing single units; and three of the beads are another color, representing five single units on the same level. The value of one of the four beads are single unit sums which are equal to the sum of all the units of one level below it.  On the Maya abacus, the first level’s sum is twenty…

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