Ordinal numbers up to 100th
key notes :
| What are Ordinal Numbers? |
Ordinal numbers tell us the position or order of things in a list. For example, who came 1st, 2nd, or 3rd in a race.
| Examples of Ordinal Numbers: |
- 1st – First
- 2nd – Second
- 3rd – Third
- 4th – Fourth
- 5th – Fifth
- 6th – Sixth
- 7th – Seventh
- 8th – Eighth
- 9th – Ninth
- 10th – Tenth
| How do we write Ordinal Numbers? |
We write ordinal numbers by adding the correct ending to the number:
- 1 → 1st
- 2 → 2nd
- 3 → 3rd
- 4 → 4th
- 5 → 5th
- 6 → 6th
- 7 → 7th
- 8 → 8th
- 9 → 9th
- 10 → 10th
- 11 → 11th
- 12 → 12th
- …
- 20 → 20th
- 21 → 21st
- 22 → 22nd
- 23 → 23rd
- 24 → 24th
- …
- 100 → 100th
| Special Endings: |
- Numbers ending in 1 (except 11) use “st” (21st, 31st, 41st, etc.)
- Numbers ending in 2 (except 12) use “nd” (22nd, 32nd, 42nd, etc.)
- Numbers ending in 3 (except 13) use “rd” (23rd, 33rd, 43rd, etc.)
- All other numbers use “th” (24th, 25th, 26th, etc.)
| Why do we use Ordinal Numbers? |
- To show the order of people or things (like winners in a race)
- To talk about dates (like 1st January, 2nd February)
- To describe positions (like 5th row, 10th page)
| Practice: |
- Who is the 1st in line?
- What is the 10th month of the year?
- Which student is sitting in the 3rd seat?
Learn with an example
➡️ What is the ninth letter in this passage?
you can lead a horse to water , but you can’t make him drink .
Count the letters until you reach 9. The a in “lead” is the ninth letter.
What is the tenth letter in this passage?
All around the mulberry bush, the monkey chased the weasel. The monkey stopped to pull up his sock, pop! goes the weasel.
Count the letters until you reach 10. The t in the first “the” is the tenth letter.
What is the third letter in this passage?
A man and his wife had the good fortune to possess a goose that laid a golden egg every day.
Count the letters until you reach 3. The a in “man” is the third letter.Back to practice
let’s practice!
