Numerals are quite difficult words in terms of grammar. We will consider examples of their spelling and pronunciation, based on the most common difficulties.
Spelling of some numerals
Numbers consisting of two bases, related to complex, are written together, for example: fifty, six hundred, nine hundred, etc.
The spelling of the numerals zero and zero is oriented in indirect cases to the second form (equal to zero, kept at zero). And stable expressions use both forms of the numeral (“I am to him: zero attention” or “He is absolute zero”).
Ordinary numerals, incorporating a part: -th millionth , -th billionth, -thousand , are written together. Example: one hundred thousandth passenger
half a million fortune, two hundred and twenty-five thousandth reader.
A negative particle not with numerals is written separately (not one, not eighteen years old, not third class).
Declension of numerals
The spelling of the numerals ninety and one hundred varies. They have an “o” at the end of the nominative and accusative cases, and when declensed, this ending changes to “a,” for example: ninety percent completed, ninety rubles short. But the numeral forty has no ending in the nominative and accusative cases, and when declining, it ends with the ending "a", for example: not even forty people have been recruited.
The nominative and accusative cases of the numeral two hundred have the ending "and", and three hundred and four hundred have the ending "a" .
The spelling of the numerals one and a half (one and a half for zh.r.) and one and a half hundred preserves this form in the accusative case, and in the remaining cases they are inclined in the same way: one and a half and one and a half, regardless of gender.
Just as a noun with a base ending in –a, feminine, the numeral thousand is inclined, and a million and a billion are inclined like masculine nouns whose stem ends in a consonant.
Numerals both (MR and SR) and both (MR) have a different type of declension. The masculine and neuter genders have the basis of the declension of both. And for the feminine basis - oboe (both, both).
Declension of compound ordinal and quantitative numbers
The spelling of the numerals also implies that with the declension of compound ordinal only the end of the last word of a given part of the speech changes. For example: seven hundred eighty three - seven hundred eighty-third - seven hundred eighty-third - about seven hundred eighty-third.
But in the composite quantitative numerals, every word included in its composition is inclined. For example: three hundred thirty-five - three hundred thirty-five - three hundred and thirty-five.
Fractional numerals are also inclined in both parts: two-thirds - two-thirds - two-thirds - about two-thirds.
Please note that when calling fractions, you should say this: three fourths, not three fourths, four integers , not four integers!
Declension of complex numbers
In complex numerals ranging from 50 to 90, as well as 200–900, each part of these words changes during declension:
I. sixty, three hundred, five hundred.
R. sixty, three hundred, five hundred.
D. sixty, three hundred, five hundred.
C. sixty, three hundred, five hundred.
T. sixty, three hundred, five hundred.
P. about sixty, about three hundred, about five hundred.
As you can see, the spelling of the names of the numerals directly depends on their rank and the indicated number.