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You are currently browsing the Pleasures with Math weblog archives for the day May 27, 2007.
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Archive for May 27, 2007
Subtraction Without Borrowing
May 27, 2007 by Uri.
I have written a procedure for dynamic subtraction, in which borrowing is replaced by dynamic addition and the subtraction that has to be done is much simpler: it is done within each place-value column, in any order; that is, subtracting the single-digit numbers in each column is completely independent of anything you do in any of the other columns. You can read more about it iin the following sites:
- Simplified Procedure
- Original (light) Procedure
- PDF download of this original version
- Detailed Explanation (download a PDF file)
- Subtraction Without Borrowing (my article)
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