What are Ordinal Numbers?

Today, we are going to learn about ordinal numbers. Ordinal numbers tell us the position of something in a list. They help us understand where something is located. For example, if you are in a race, the first person to cross the finish line is in 1st place.

Key Points about Ordinal Numbers:

  1. Position: Ordinal numbers show the order of things.
  2. Ending: Many ordinal numbers end with “-st”, “-nd”, “-rd”, or “-th”.
    • 1st (first)
    • 2nd (second)
    • 3rd (third)
    • 4th (fourth)
    • 11th (eleventh)
    • 21st (twenty-first)
    • 22nd (twenty-second)
    • 23rd (twenty-third)
    • 31st (thirty-first)
    • 100th (one hundredth)

How to Form Ordinal Numbers:

  • 1 to 3: These numbers have special endings:
    • 1 → 1st
    • 2 → 2nd
    • 3 → 3rd
  • 4 to 20: Most numbers end in “-th”:
    • 4 → 4th
    • 5 → 5th
    • 10 → 10th
    • 20 → 20th
  • 21 to 99: You can combine the numbers:
    • 21 → 21st
    • 22 → 22nd
    • 99 → 99th
  • 100: The last number we will learn today is 100.
    • 100 → 100th

Tips and Tricks:

  • Remember the exceptions: The first three numbers are different, so make sure to remember them!
  • Practice makes perfect: The more you use ordinal numbers, the easier they will become to remember.
  • Use visuals: Try drawing a number line and marking the ordinal numbers on it.

Questions for Practice

Easy Level (1-20)

  1. What is the ordinal number for 1?
  2. What is the ordinal number for 2?
  3. What is the ordinal number for 3?
  4. What is the ordinal number for 4?
  5. What is the ordinal number for 5?
  6. What is the ordinal number for 6?
  7. What is the ordinal number for 7?
  8. What is the ordinal number for 8?
  9. What is the ordinal number for 10?
  10. What is the ordinal number for 11?
  11. What is the ordinal number for 12?
  12. What is the ordinal number for 13?
  13. What is the ordinal number for 14?
  14. What is the ordinal number for 15?
  15. What is the ordinal number for 16?
  16. What is the ordinal number for 17?
  17. What is the ordinal number for 18?
  18. What is the ordinal number for 19?
  19. What is the ordinal number for 20?
  20. What is the ordinal number for 9?

Medium Level (21-50)

  1. What is the ordinal number for 21?
  2. What is the ordinal number for 22?
  3. What is the ordinal number for 23?
  4. What is the ordinal number for 24?
  5. What is the ordinal number for 25?
  6. What is the ordinal number for 30?
  7. What is the ordinal number for 31?
  8. What is the ordinal number for 32?
  9. What is the ordinal number for 40?
  10. What is the ordinal number for 41?
  11. What is the ordinal number for 42?
  12. What is the ordinal number for 43?
  13. What is the ordinal number for 44?
  14. What is the ordinal number for 50?
  15. What is the ordinal number for 35?
  16. What is the ordinal number for 36?
  17. What is the ordinal number for 45?
  18. What is the ordinal number for 47?
  19. What is the ordinal number for 49?
  20. What is the ordinal number for 48?

Hard Level (51-100)

  1. What is the ordinal number for 51?
  2. What is the ordinal number for 52?
  3. What is the ordinal number for 53?
  4. What is the ordinal number for 60?
  5. What is the ordinal number for 61?
  6. What is the ordinal number for 70?
  7. What is the ordinal number for 71?
  8. What is the ordinal number for 80?
  9. What is the ordinal number for 81?
  10. What is the ordinal number for 90?
  11. What is the ordinal number for 91?
  12. What is the ordinal number for 92?
  13. What is the ordinal number for 99?
  14. What is the ordinal number for 100?
  15. What is the ordinal number for 75?
  16. What is the ordinal number for 54?
  17. What is the ordinal number for 55?
  18. What is the ordinal number for 62?
  19. What is the ordinal number for 64?
  20. What is the ordinal number for 88?

Answers to the Questions

Easy Level Answers

  1. 1st
  2. 2nd
  3. 3rd
  4. 4th
  5. 5th
  6. 6th
  7. 7th
  8. 8th
  9. 10th
  10. 11th
  11. 12th
  12. 13th
  13. 14th
  14. 15th
  15. 16th
  16. 17th
  17. 18th
  18. 19th
  19. 20th
  20. 9th

Medium Level Answers

  1. 21st
  2. 22nd
  3. 23rd
  4. 24th
  5. 25th
  6. 30th
  7. 31st
  8. 32nd
  9. 40th
  10. 41st
  11. 42nd
  12. 43rd
  13. 44th
  14. 50th
  15. 35th
  16. 36th
  17. 45th
  18. 47th
  19. 49th
  20. 48th

Hard Level Answers

  1. 51st
  2. 52nd
  3. 53rd
  4. 60th
  5. 61st
  6. 70th
  7. 71st
  8. 80th
  9. 81st
  10. 90th
  11. 91st
  12. 92nd
  13. 99th
  14. 100th
  15. 75th
  16. 54th
  17. 55th
  18. 62nd
  19. 64th
  20. 88th

Great job, everyone! Keep practicing your ordinal numbers, and you will get even better!