Set up the subtraction problem in long subtraction format.

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Borrow from the digit in the next column to the left. Add the borrowed to . Reduce the number that was borrowed from by .

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Subtract from .

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Borrow from the digit in the next column to the left. Add the borrowed to . Reduce the number that was borrowed from by .

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Subtract from .

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Subtract from .

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The result of is .

Subtract 10-2.5