- 1vA2
/səbˈtrækt/
To take one number or amount away from a larger one.
減去；扣除
過去式 subtracted過去分詞 subtracted-ing subtracting三單 subtracts
核心畫面
Picture a pile and a hand taking some of it away, leaving a smaller pile. What matters in English is the direction the sentence runs: you subtract the small number FROM the big one. Get that order right and the word gives you no further trouble.
可以想成：一堆東西，有隻手拿走一部分，剩下比較小的一堆。這個字在英文裡真正要留意的是方向：你是把小的數字「從」大的數…更多收起
可以想成：一堆東西，有隻手拿走一部分，剩下比較小的一堆。這個字在英文裡真正要留意的是方向：你是把小的數字「從」大的數字裡減掉——subtract 5 from 12。把這個順序記牢，這個字就不會再出錯了。原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
subtractverb/səbˈtɹækt/
- 1
arithmeticTo remove or reduce; especially to reduce a quantity or number.
- If you subtract the $100 for gas from the total cost, it was a fairly inexpensive trip.
- I could add and subtract and multiply and divide, but I entered the wilderness when words became equations. […] The axioms of arithmetic imply that when you expand (a + b)², for example, you get a² + 2ab + b² in the following way: (a + b)² is equal to (a + b)(a + b). Each term in one parentheses multiplies the terms in the other: a × a = a² ; a × b = ab; b × a = ab; b × b = b². Combining the terms, a² + ab + ab + b² = a² + 2ab + b². In a similar way, a² – b², a squared number subtracted from another squared number, called a difference of squares, becomes (a – b)(a + b), which becomes a² + ab – ab – b², which is a² – b².
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。