Changes

There are some alternative interpretations of how the Yupana works, e.g., [http://www.atlantisbolivia.org/decodingquipumaths.htm]. In this version, the base is 20, and rows with multiple dots are counted as 2s.

There are some alternative interpretations of how the Yupana works, e.g., [http://www.atlantisbolivia.org/decodingquipumaths.htm]. In this version, the base is 20, and rows with multiple dots are counted as 2s.

Yet another interpretation (by the author) is that the factor of each bead is based on the number of beads in its containing box.

Yet another interpretation (by the author) is that the factor of each bead is based on the number of beads in its containing box, e.g., each bead in the top row, x1; in the second row, x2; in the third row, x3; and in the bottom row, x5.

Both of these alternative interpretations are available under the "spanner" toolbar beginning with Version 3. And in a subsequent version, the learner will be able to explore their own interpretations of how the Yupana works.

Both of these alternative interpretations are available under the "spanner" toolbar beginning with Version 3. And in a subsequent version, the learner will be able to explore their own interpretations of how the Yupana works.