subtraction

/səbˈtrækʃn/ (bre, ipa) · [səbtrˈækʃən] /səbˈtrækʃn/ (ame, ipa) · [səbtrˈækʃən] /səb-ˈtrak-shən How to pronounce subtraction (audio)/ (ame, mw)

subtraction — noun

1. In arithmetic, finding how many remain when a smaller number is taken away from

1.名詞A2
釋義

In arithmetic, finding how many remain when a smaller number is taken away from a larger one — the opposite of addition.

例句

The teacher showed how subtraction helps solve problems like working out change at a shop.

uncountable noun referring to the general operation

Luca learned to do subtraction by counting backward on his fingers in maths class.

collocation: do subtraction

同義詞
  • taking away

    informal phrase used especially with children; less technical than subtraction

  • deduction

    emphasises removing an amount from a total; common in financial or logical contexts

  • minus

    used as a preposition or adjective in arithmetic, not a direct noun synonym

反義詞
  • addition

    the opposite arithmetic operation; adding numbers together instead of taking one away from another

文法句型

subtraction + of + noun + from + noun

用法筆記

Usually uncountable when referring to the mathematical operation in general. May be used with the indefinite article when referring to a specific calculation (e.g. a quick subtraction).

常見錯誤

❌I did a subtract.
✅I did a subtraction.
💡subtract is a verb, not a noun.
❌The subtraction of 5 and 3 equals 2.
✅The subtraction of 3 from 5 equals 2.
💡use from, not and, to show which number is taken from which.