Numeral declension rules

There are a lot of rules in Russian. And besides, there are very few rules without exceptions. That is why it is considered one of the most difficult to study. And it’s not even about studying by foreigners, sometimes even native speakers have a hard time.

Declination of simple quantitative numbers

To the category of simple numbers are those numerals that have in their composition only one root, for example: "five", "seven", "ten". They are bent like singular nouns, feminine ("night", "help"). That is, in the nominative and accusative cases the ending is "-b", in the instrumental "-th", in the remaining "-i". This is the declension of the numeral "five":

- Nominative case: five.

- Genitive: five.

- Dative case: five.

- Accusative: five.

- Corps case: five.

- Prepositional (o) five.

The declination of complex quantitative numbers

Complex numerals are called numerals that consist of two roots ("eleven", "fifty", "three hundred"). The declension of these numerals has the following features: for numerals ending in "ten" only endings are inclined, and for those ending in "fifty", "hundred" (the latter also include two hundred, three hundred, four hundred) both roots are inclined in a number of cases. In detail:

- Nominative case: fifteen; sixty; seven hundred.

- Genitive: fifteen; sixty; seven hundred.

- Dative case: fifteen; sixty; to seven hundred.

- Accusative: fifteen; sixty; seven hundred.

- Corps case: fifteen; sixty; by seven hundred.

- Prepositional (o) of fifteen; sixty; seven hundred.