NumbersA0
Numbers from 0 to a million, and the ordinals first, second, third. Numbers in -teen stress the end and numbers in -ty the start: thirteen is 13, thirty is 30.
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No information at the current level. This view starts at A0: choose A0 or a higher level.
CheatsheetA0
| Point | Rule | Example |
|---|---|---|
| 0–12 | each has its own word; -teen starts at 13 | zero / eleven / twelve |
| -teen | 13–19 add stressed -teen; 13, 15 and 18 change their first part | thirteen /θɜːˈtiːn/ · fifteen · eighteen |
| -ty | tens end in -ty and the stress is on the first part | thirty /ˈθɜːti/ · forty |
| 21–99 | ten + hyphen + unit | twenty-one / forty-five |
| hundred, thousand, million | they stay singular after a number; and comes after hundred | two hundred and fifty / five million |
| Ordinals | the order of things: first, second, third; from 4 add -th | My flat is on the second floor. / the fourth of July |
| Short ordinals | number + the last two letters of the word | 1st / 2nd / 3rd / 4th |
| Compound ordinals | only the last word changes | twenty-first / a hundred and second |
| Phone numbers | say each digit; 0 is oh; two equal digits are double | 077 → oh double seven |
| Comma and point | a comma separates thousands; a point separates decimals | 1,500 / 2.5 → two point five |
| Trap | five, nine, twelve and twenty change their spelling in ordinals | fifth / ninth / twelfth / twentieth |
| Trap | forty drops the u that fourteen keeps | fourteen ≠ forty |
0 to 12A0
| Number | Word | Pronunciation |
|---|---|---|
| 0 | zero | /ˈzɪərəʊ/ |
| 1 | one | /wʌn/ |
| 2 | two | /tuː/ |
| 3 | three | /θriː/ |
| 4 | four | /fɔː/ |
| 5 | five | /faɪv/ |
| 6 | six | /sɪks/ |
| 7 | seven | /ˈsevn/ |
| 8 | eight | /eɪt/ |
| 9 | nine | /naɪn/ |
| 10 | ten | /ten/ |
| 11 | eleven | /ɪˈlevn/ |
| 12 | twelve | /twelv/ |
- In phone numbers, say each digit. 0 is oh /əʊ/; two equal digits are double: 077 → oh double seven.
13 to 19A0
| Number | Word | Pronunciation |
|---|---|---|
| 13 | thirteen | /θɜːˈtiːn/ |
| 14 | fourteen | /fɔːˈtiːn/ |
| 15 | fifteen | /fɪfˈtiːn/ |
| 16 | sixteen | /sɪksˈtiːn/ |
| 17 | seventeen | /sevnˈtiːn/ |
| 18 | eighteen | /eɪˈtiːn/ |
| 19 | nineteen | /naɪnˈtiːn/ |
- 13–19 add -teen; 13, 15 and 18 change their first part: thirteen, fifteen, eighteen.
20 to 90A0
| Number | Word | Pronunciation |
|---|---|---|
| 20 | twenty | /ˈtwenti/ |
| 30 | thirty | /ˈθɜːti/ |
| 40 | forty | /ˈfɔːti/ |
| 50 | fifty | /ˈfɪfti/ |
| 60 | sixty | /ˈsɪksti/ |
| 70 | seventy | /ˈsevnti/ |
| 80 | eighty | /ˈeɪti/ |
| 90 | ninety | /ˈnaɪnti/ |
- Tens end in -ty. Ten + hyphen + unit: twenty-one, forty-five, ninety-nine.
- -teen is stressed; -ty is not: thirteen /θɜːˈtiːn/ ≠ thirty /ˈθɜːti/.
Hundreds, thousands, millionsA0
| Number | Words |
|---|---|
| 100 | a / one hundred |
| 105 | a hundred and five |
| 250 | two hundred and fifty |
| 1,000 | a / one thousand |
| 1,250 | one thousand two hundred and fifty |
| 10,000 | ten thousand |
| 1,000,000 | a / one million |
| 2.5 | two point five |
- and comes after hundred: three hundred and five (US: three hundred five).
- After a number, hundred, thousand and million stay singular: two hundred, five million.
- A comma separates thousands; a point separates decimals: 1,500 / 2.5.
Ordinal numbersA0
| Number | Ordinal | Pronunciation |
|---|---|---|
| 1st | first | /fɜːst/ |
| 2nd | second | /ˈsekənd/ |
| 3rd | third | /θɜːd/ |
| 4th | fourth | /fɔːθ/ |
| 5th | fifth | /fɪfθ/ |
| 6th | sixth | /sɪksθ/ |
| 7th | seventh | /ˈsevnθ/ |
| 8th | eighth | /eɪtθ/ |
| 9th | ninth | /naɪnθ/ |
| 10th | tenth | /tenθ/ |
| 12th | twelfth | /twelfθ/ |
| 20th | twentieth | /ˈtwentiəθ/ |
| 100th | hundredth | /ˈhʌndrədθ/ |
- 1, 2 and 3 have their own words. From 4, add -th.
- Spelling changes: five → fifth, nine → ninth, twelve → twelfth, twenty → twentieth.
- Written short: number + the last two letters of the word: 1st, 2nd, 3rd, 4th.
- In compound numbers, only the last word changes: twenty-first, a hundred and second.
- Ordinals give the order of things: floors, places, dates. My flat is on the second floor.
Typical errorsA0
| ✗ | ✓ | Rule |
|---|---|---|
| thirteen /ˈθɜːtiːn/ | thirteen /θɜːˈtiːn/ | -teen is stressed |
| fourty | forty | forty has no u |
| 1th / 2th / 3th | 1st / 2nd / 3rd | last two letters of the word |
| nineth / twelveth | ninth / twelfth | the spelling changes |