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# thirty

«thirty» in Mova's school dictionary: **the number 30** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

number (thirty)

### meaning for a pupil

1) Thirty is the number 30. It is three tens. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#m1)

2) Half an hour is 30 minutes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#m2)

3) Many months have 30 days. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#m3)

### sense in the lessons

Maths: a number of things; minutes in half an hour; days in many months; counting in tens. Everyday: «half past» on a clock means thirty minutes past the hour; ages, prices, speed limits.

### examples

- There are thirty children in the class. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#x1)
- He waited thirty minutes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#x2)
- Thirty is three times ten. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#x3)
- She saved thirty dollars. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#x4)
- Half an hour is thirty minutes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#x5)
- April, June, September and November have thirty days. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#x6)
- The speed limit here is thirty miles an hour. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#x7)
- I've been living in the forest for thirty years. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/#x8)

### note

A number written in words; read it as 30. Half an hour is thirty minutes. Trap: do not confuse thirty (30) with thirteen (13).

### Trees and pragmatics

[Every meaning and example of «thirty» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/T/thirty/), each sentence with its dependency tree and frames.