|Noah Webster's Dictionary|
(v. t.) To withdraw, or take away, as a part from the whole; to deduct; as, subtract 5 from 9, and the remainder is 4.
Subtract (1 Occurrence)
Deuteronomy 4:2 You shall not add to the word which I command you, neither shall you diminish from it, that you may keep the commandments of Yahweh your God which I command you. (See NIV)