Here is the short answer, in case you are in a rush: '1st' is the correct numeric abbreviation of the ordinal first. '1th' is a grammatical error, and it should never be used. The brief overview will help you if you need to quickly decide which spelling to use, but there is more to learn. Abbreviation of first. In summary, “1st” is correct, and “1th” is an error—but don’t let that scare you! English can seem complicated with its rules and exceptions, but with regular practice and a good attitude, you’ll get the hang of it. Mongolia’s CS2 community server featuring free skinchanger, ranked PUG system, and stable low ping gameplay Serving the northern Indiana-southwestern Michigan area with nearly $8 billion in assets and more than 1100 employees, 1st Source is here for you. The ordinal numbers from 1 to 10 are as follows: 1st: First, 2nd: Second, 3rd: Third, 4th: Fourth, 5th: Fifth, 6th: Sixth, 7th: Seventh, 8th: Eighth, 9th: Ninth, and 10th: Tenth. Looking to manage your business accounts online? FirstBank offers Combined Personal and Business Account Access, Business Online Banking 3, and Internet Cash Management 4 to help your business achieve more. See which service is best suited for your business needs. What are the fees for Internet Cash Management? Ordinal numbers may be written in English with numerals and letter suffixes: 1st, 2nd or 2d, 3rd or 3d, 4th, 11th, 21st, 101st, 477th, etc., with the suffix acting as an ordinal indicator. Learn how to use ordinal numbers in English with clear grammar rules, common usage, and examples. Includes a full list from 1st to 100th.