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Me adding 123456789 to itself on abacus in right-to-left order - Step 1

In this exercise I'm showing how to add the number 123456789 to itself on the giant Soda Hall abacus. I add in right-to-left order, first adding 9 in the ones column, then 8 in the tens column, etc. This first step shows 123456789 entered on the abacus.

 

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Uploaded on January 28, 2012
Taken on January 27, 2012