Ordinal Numbers

Ordinal numbers differ from Cardinal numbers (or normal numbers used for counting. i.e.  1, 2, 3…) in that ordinal numbers refer to a position in a series. They are also used for days the month.

For example: 

Position:

  • On Monday, my first class is biology, my second class is gym.
  • She ran fast and won the race. She was first.
  • Her best friend doesn’t run very fast and she came in seventh.

Dates:

  • Today is June the fifth.
  • On February fourteenth, we celebrate Valentine’s Day.

We normally write ordinal numbers in number form and not in letter form when we talk about days of the month. We would generally write February fourteenth as February 14th .

Two important things to remember:

  • Any ordinal number that doesn’t end in ‘st, nd, rd’ such as in “first”, “second”, or “third” or 1st, 2nd, 3rd, ends in th - fifth, 5th, eleventh, 11th…etc.
  • All ordinal numbers from twenty-one through ninety-nine should be separated by a hyphen (twenty-two, seventy-first). A comma is optional with four-digit numbers but required with five-digit numbers (25,000   30,000).

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 Ordinal Number Chart

1st - first 11th - eleventh 21st - twenty-first    

40th - fortieth

2nd -second 12th - twelfth 22nd -twenty-second50th - fiftieth
3rd - third 13th - thirteenth23rd - twenty-third60th - sixtieth
4th - fourth 14th - fourteenth24th - twenty-fourth70th - seventieth
5th - fifth 15th - fifteenth25th - twenty-fifth80th - eightieth
6th - sixth 16th - sixteenth26th - twenty-sixth90th - ninetieth
7th - seventh 17th - seventeenth27th - twenty-seventh100th - one hundredth
8th - eighth 18th - eighteenth28th - twenty-eighth1000th -  one thousandth
9th - ninth 19th - nineteenth29th - twenty-ninth 100,000th - one hundred thousandth
10 - tenth 20th - twentieth30th - thirtieth1,000,000th - one millionth

Practice:

Easy Ordinal Review- user:l_miguez/Ordinal_easy_activity

Ordinal Listening Review - user:l_miguez/Ordinal_Listen

Complete the Sentence with the Correct Ordinal - user:l_miguez/Ordinal_Sentence_complete

Picture Activity - user:l_miguez/Ordinals_picture_activity