Remember, no space between hyphen and words. Twenty-first = 21st (It's her 21st on Sunday.) Using a hyphen also applies to ordinal numbers from 21st. One thousand two hundred and thirty-one pounds Notice there's no space between the letters and hyphen: We need a hyphen when we write cardinal numbers from 21 upwards. Hyphens for Normal Numbers and Ordinal Numbers from 21 upwards Third - last two letters are 'rd' so put after 3 = 3rdĤth - last two letters are 'th' so put after 4 = 4thġ5th = fifteenth (It's her fifteenth birthday.) After this set, the third set of 21 to 30 becomes easier to learn because it has numbers starting from twenty followed by a suffix of one, two, three, and so on. Second - last two letters are 'nd' put after 2 = 2nd This is (11) eleven, (12) twelve, (13) thirteen, (14) fourteen, (15) fifteen, (16) sixteen, (17) seventeen, (18) eighteen, (19) nineteen, and (20) twenty. Look at these and notice the last two letters of the wordsĬan you see the last two letters of the words make up the ordinal number?įir st - last two letters are 'st' so put after 1 = 1st
But it's OK to write them in numbers (1st, 2nd, 3rd.) in informal writing to friends, colleagues, social media comments, etc. We need to write these ordinal numbers in words in formal writing - business, job applications, etc. In this lesson, we're looking at the spelling of ordinal numbers and a few rules.ģrd = third (Take the third turning on the left.)ĥth = fifth (This is the 5th time I've taken my driving test.) Why do we spell 1st, 2nd, 3rd, 4th like this? These numbers are called ordinal numbers.
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