Dictionary · E
Exchange
In column subtraction, trading one of a place for ten of the place to its right so that a digit can be subtracted. Also called borrowing.
Example
To work out , exchange one ten for ten ones, giving .
Dictionary · E
In column subtraction, trading one of a place for ten of the place to its right so that a digit can be subtracted. Also called borrowing.
To work out , exchange one ten for ten ones, giving .