An amount that can be measured or counted and written as a number, such as a length, a weight, a number of items, or a price.
例文
話し言葉 Let's write the relationship between these two quantities as an equation. この 2 つの数量の関係を、等式で表してみよう。
書き言葉・答案 A car travels at 50 miles per hour for t hours and goes d miles. Write an equation relating the quantities d and t. 車が時速 50 マイルで t 時間走り、d マイル進んだ。数量 d と t の関係を等式で表せ。
言い間違えやすいところ
英語の quantity は、かっこでくくった式の一部をまとめて指すこともある。this quantity squared は、かっこの中全体の 2 乗のこと（(x + 1)² は the quantity x plus 1, squared と読む）。
日常の英語の quantity は「量」「分量」の意味で、in large quantities（大量に）のようにも使う。
根拠の件数
話し言葉計 47
a quantity !squared !cubed | two quantities !squared !cubed | these quantities | both quantities | each quantity | another quantity | unknown quantity | known quantity | same quantity | related quantities47
書き言葉計 131
a quantity !squared !cubed | two quantities !squared !cubed | these quantities | both quantities | each quantity | another quantity | unknown quantity | known quantity | same quantity | related quantities131
Khan Academy Algebra ／ Khan Academy AP Calculus ／ Khan Academy Middle School (6th-8th Grade, Pre-Algebra) ／ MIT OCW 18.01 Single Variable Calculus ／ MIT OCW 18.02 Multivariable Calculus ／ MIT OCW 18.03 Differential Equations ／ MIT OCW 18.06 Linear Algebra ／ 3Blue1Brown ／ PatrickJMT
取得元（書き言葉）
MIT OCW lecture notes ／ OpenStax Algebra and Trigonometry 2e ／ OpenStax Calculus Vol 1-3 ／ OpenStax Elementary Algebra 2e ／ OpenStax Intermediate Algebra 2e ／ OpenStax Introductory Statistics 2e ／ OpenStax Prealgebra 2e ／ OpenStax Precalculus 2e