math

From Wiktionary

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• maths (UK, Australia)

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[change] Noun

Singular math

Plural maths

1. (uncountable) Math is a short form of mathematics.
2. (uncountable) Mathematical calculations.

   $170 a month? That doesn't sound right. Let me check your math.

3. (countable) A math class.

   I have 2 more maths to take before I can graduate.