LoginOrdinal Numbers For Intermediate learners
Why Do We Use Ordinal Numbers
We use ordinal numbers to show the position of something on a list or in a certain order.
How to Write Ordinal Numbers: 1-10
We usually add 'th' at the end of numbers in order to turn them into ordinal numbers. But one, two, and three are exceptions. Take a look at the list below:
Written | Numeral |
|---|---|
first | 1st |
second | 2nd |
third | 3rd |
fourth | 4th |
fifth | 5th |
sixth | 6th |
seventh | 7th |
eighth | 8th |
ninth | 9th |
tenth | 10th |
Tip!
Pay attention to the spelling of ordinal numbers. The spelling of some numbers changes when we add 'th'. For example:
Five → fifth
Eight → eighth
Nine → ninth
How to Write Ordinal Numbers: 11-20
Just like ordinal numbers from four to ten, ordinal numbers from 11 to 20 get 'th' at the end. Take a look at this list:
Written | Numeral |
|---|---|
eleventh | 11th |
twelfth | 12th |
thirteenth | 13th |
fourteenth | 14th |
fifteenth | 15th |
sixteenth | 16th |
seventeenth | 17th |
eighteenth | 18th |
nineteenth | 19th |
twentieth | 20th |
Tip!
You can see that the spelling of some numbers changes. For example:
twelve → twelfth
Twenty → twentieth
How to Write Ordinal Numbers: Compound
When we want to write compound ordinal numbers, we use this form: the first part (cardinal number) + hyphen + second part (ordinal number)
Written | Numeral |
|---|---|
twenty-first | 21st |
twenty-second | 22nd |
twenty-third | 23rd |
twenty-fourth | 24th |
twenty-fifth | 25th |
twenty-sixth | 26th |
twenty-seventh | 27th |
twenty-eighth | 28th |
twenty-ninth | 29th |
How to Write Ordinal Numbers: The Tens
As you saw before, when forming ordinal numbers, the letter 'y' at the end of the number changes into 'ie'. Take a look at the list below:
Written | Numeral |
|---|---|
tenth | 10th |
twentieth | 20th |
thirtieth | 30th |
fortieth | 40th |
fiftieth | 50th |
sixtieth | 60th |
seventieth | 70th |
eightieth | 80th |
ninetieth | 90th |
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