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Description:
 Large number subtraction with borrowing. You may need to use pencil and paper.
  
 Adaptive Learning Progression: Subtracts with just the 10's and/or 100's column, then later includes the 1's column.  | 
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Sample Levels (out of 7)
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 Subtract.  | |
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 Subtract.  | |
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 Subtract.  | 
