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Subtracting 123456789 from 246913578 in left-to-right order - Step 7

I'm now subtracting 5 in the 5th position from the left. This is done in 3 steps: subtract 50, add 40, add 5. In this step I subtract 50 by subtracting 5 in the 4th position from the left.

 

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