maths

Compared meaning: the subject of mathematics (noun).

比较义项：数学（这门学科）（名词）。

• mathematics

  The full, formal word for the subject, used in academic, written, or official contexts (course titles, degrees, textbooks); sounds stiff in casual conversation.

  这是该学科完整、正式的说法，用于学术、书面或正式场合（课程名称、学位、教材等）；在日常口语中使用会显得生硬。

  She earned a doctorate in mathematics from a top European university.

  她在一所欧洲顶尖大学获得了数学博士学位。

• math

  The everyday spoken abbreviation used in American English; natural in casual conversation but not used in formal writing like degree titles.

  这是美式英语中日常口语使用的缩写形式，用于随意的交谈，但不会出现在学位名称等正式书面语中。

  He struggles with math homework but loves reading books.

  他不擅长做数学作业，但喜欢读书。

• maths 本词

  The everyday spoken abbreviation used in British English (and other Commonwealth varieties); would sound American if swapped for math.

  这是英式英语（以及其他英联邦地区）中日常口语使用的缩写形式；若换成 math 则会显得是美式说法。

  My brother struggles with maths homework every single evening after school.

  我弟弟每天晚上放学后都为数学作业发愁。

All three name the same school subject, mathematics. Mathematics is the full, formal word, used in academic or official writing like course titles and degrees. Math is the everyday spoken short form in American English. Maths is the same, but in British English.

这三个词指的是同一门学科——数学，但在正式程度和地域用法上不同：mathematics 是完整、正式的说法，math 和 maths 是它的口语缩写，分别通行于美式英语和英式英语。三者在本义项上没有其他需要排除的义项。