List of Cardinal and Ordinal Numbers - Writing English Numerals
I am twenty years old. I have four friends.
Ordinal numbers refer to a position in a series.
My first friend is a student. Today is his nineteenth birthday.
Any ordinal name that doesn't end in st, nd, rd (as in "first", "second", or "third"), ends in th.
All compound 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 (3000 30,000)
Standard English Language Rules for Numbers
English Numerals Rules for Writing Numbers
Practice Spelling Cardinal Numbers and Spelling Ordinal Numbers
Writing Numbers. List of Cardinal and Ordinal Numbers.
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