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''Subtraction'' is the [[mathematics|mathematical]] function which involves the decrease of a value, the minuend, by another value, the subtrahend, which yields a directly related linear decrease in the overall value, except in the case of a negative subtrahend, in which case the value increases.

'''Subtraction''' is the [[mathematics|mathematical]] function which involves the decrease of a value, the minuend, by another value, the subtrahend, which yields a directly related linear decrease in the overall value, except in the case of a negative subtrahend, in which case the value increases.