I believe Russian uses ordinal indicators (1st, 2nd, 3rd, 4th ... 100th) like this:
1-й
2-й
3-й
4-й
5-й
10-е
What are the rules for assigning the suffix?
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Sign up to join this communityI believe Russian uses ordinal indicators (1st, 2nd, 3rd, 4th ... 100th) like this:
1-й
2-й
3-й
4-й
5-й
10-е
What are the rules for assigning the suffix?
It depends on the numbered object, especially on grammatical gender and number of this, - like in the inflectional language. By the fact, ordinal numbers are adjectives. So, see the rules for adjective's endings and declinations.
https://www.translate.ru/grammar/ru-es/первый
https://www.translate.ru/grammar/ru-es/второй
https://www.translate.ru/grammar/ru-es/третий
Somebody consider that one last letter is enough ( https://clck.ru/QsBDS ), but , really, you can find often the two letters. : > 1-ый 2-ой 3-ий 4-ый 5-ый 6-ой 7-ой 8-ой 9-ый 10-ый It's for the masculine gender. The feminine gender are 1-ая, and others the same. The neuter gender are 1-ое , etc. .
The last digit in a number only is taken into account. About adj. - Compare "краснЫЙ", f.e.
P.S. Your "1-й" - it's masculine gender. "10-е" - it's neuter gender ( 10-ое neuter gender, if it is singular object, or "десят-ые", 10-ые any gender, if it's a plural something; also one reason for two letters ).
P.P.S. https://youtu.be/r9KlGJ-R5RM :)