subtract: [16] To subtract something is etymologically to ‘pull it away’. The word comes from subtractus, the past participle of Latin subtrahere ‘pull away’. This was a compound verb formed from the prefix sub-, usually ‘under’ but here used in the sense ‘away’, and trahere ‘pull’ (source of English traction, tractor, trait, etc). The strictly mathematical use of the word is a post-Latin development. => contract, retract, traction, tractor, trait
subtract (v.)
1530s, "withdraw, withhold, take away, deduct," a back-formation from subtraction (q.v.), or else from Latin subtractus, past participle of subtrahere "take away, draw off." Related: Subtracted; subtracting. Mathematical calculation sense is from 1550s. Earlier verb form was subtraien (early 15c. in the mathematical sense), which is directly from the Latin verb.
Here he teches te Craft how tou schalt know, whan tou hast subtrayd, wheter tou hast wel ydo or no. ["Craft of Numbering," c. 1425]
例文
1. Please subtract a quarter of the money for your own use.
あなたの小遣いから4分の1を差し引いてください。
2. Subtract four from nine and you have five.
9から4を引くと5.
3.In their first year at school，most children learn to add and subtract .
入学1年目には、多くの子供が加減算を学んでいる。
4.When you subtract two numbers,you subtract a subtrahend from a minuend.
2つの数の減算を行うと、1つの被減算数を使用して別の減算数を減算します。
5.The little girl has begun to learn to add and subtract .