记忆方法
1、sub- + tract- + -ion.
英语词源
- subtraction (n.)
- c. 1400, "withdrawal, removal," from Late Latin subtractionem (nominative subtractio) "a drawing back, taking away," from past participle stem of Latin subtrahere "take away, draw off, draw from below," from sub "from under" (see sub-) + trahere "to pull, draw" (see tract (n.1)). The mathematical sense is attested from early 15c.
Þou most know þat subtraccion is drawynge of one nowmber oute of anoþer nomber. ["The Crafte of Nombrynge," c. 1425]
权威例句
- 1. I looked at what he'd given me and did a quick subtraction.
- 我看着他给我的东西，快速做了个减法。
- 2. She's ready to learn simple addition and subtraction.
- 她已经可以开始学习简单的加减法。
- 3. children learning addition and subtraction
- 学习加减的儿童
- 4. The difference is found by subtraction.
- 用减法得出差额.
- 5. The plus sign is used in addition and the minus is used in subtraction.
- 加号用于加法;减号用于减法.
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