Keywords: abacus beads addition add sum computation indoor photo border In this exercise I'm showing how to add the number 123456789 to itself on the giant Soda Hall abacus. I add in left-to-right order, first adding 1 in the leftmost column, then 2 in the next column to the right, etc. For this particular computation, this order is slightly easier. This first step shows 123456789 entered on the abacus. In this series, I am not present - this makes it less obvious what was changed, but does not occlude the abacus. CC0 waiver: To the extent possible under law, I waive all copyright and related or neighboring rights to this work. In this exercise I'm showing how to add the number 123456789 to itself on the giant Soda Hall abacus. I add in left-to-right order, first adding 1 in the leftmost column, then 2 in the next column to the right, etc. For this particular computation, this order is slightly easier. This first step shows 123456789 entered on the abacus. In this series, I am not present - this makes it less obvious what was changed, but does not occlude the abacus. CC0 waiver: To the extent possible under law, I waive all copyright and related or neighboring rights to this work. |