Russian Numbers and Cases: How to Say Dates, Prices and Phone Numbers Without Mistakes

You've learned Russian cases, memorized endings, practiced with nouns. Then someone asks your phone number or date of birth, and suddenly those familiar case patterns feel completely different. Numbers in Russian follow their own declension logic, and today you'll learn exactly how to handle them in real conversations.

When foreigners study russian numbers and cases, they often assume numbers work like regular adjectives. That assumption leads to mistakes in the simplest everyday situations: booking a table for three people, saying a price, or giving your address. The truth is, Russian numerals have unique declension patterns that even native speakers sometimes stumble over.

This guide breaks down exactly how to decline numbers in russian sentences when you're talking about dates, money, phone numbers and age. No theoretical overload, just the patterns you'll actually use.

How Russian Cases Work With Numbers: The Core Logic

Before we dive into specific situations, you need to understand the fundamental rule. In Russian, the number itself changes based on the case, and it also forces the noun that follows into a specific form. Both pieces move together.

Here's where it gets tricky: the endings depend on what the number ends with. Numbers ending in 1 (except 11) behave one way. Numbers ending in 2, 3, 4 (except 12-14) behave another. Numbers ending in 5-9, 0, and 11-14 follow a third pattern.

Let's look at the nominative case first, because this is your baseline:

Notice something strange? After 2, 3, 4, the noun looks singular (студента) but means plural. This is pure Russian logic. After 5 and above, you get the genitive plural (студентов).

Now, when you put these numbers into other cases, both the number and the noun change. With 2, 3, 4 especially, the declension gets complex because these numbers have gender forms and full case paradigms.

Russian Numbers Declension Table for Foreigners

Let's focus on the numbers you'll use most often. Here's how cardinal numbers from 1 to 5 decline through cases (masculine forms shown):

See the pattern? The numbers 5-20 and 30 follow the same soft declension as пять. Meanwhile, 2, 3, 4 have unique instrumental forms (двумя, тремя, четырьмя) that many learners forget.

For compound numbers like 23 or 51, you only decline the last part: двадцать три рубля (nominative), but с двадцатью тремя рублями (instrumental). The first part (двадцать) stays frozen in nominative.

Russian Ordinal Numbers: A Different Game

Ordinal numbers (first, second, third) behave like regular adjectives. They agree with the noun in gender, number and case. This is actually easier than cardinal numbers.

Example: первый день (first day, masculine), первая неделя (first week, feminine), первое место (first place, neuter). Decline them exactly like the adjective новый (new).

You'll use ordinals constantly for dates, which brings us to our next section.

How to Say Date of Birth in Russian

Dates in Russian rely on ordinal numbers in a specific construction. When you answer "What date is it?" or "When were you born?", you use the genitive case of the month name and a neuter ordinal number in genitive.

The question is: Какое сегодня число? (kakoye segodnya chislo?, literally "What number is today?") or Какого числа вы родились? (kakogo chisla vy rodilis'?, "What date were you born?").

Your answer uses this pattern: [ordinal number in genitive neuter] + [month in genitive].

Examples:

• 15 марта (pyatnadtsatoye marta) - fifteenth of March
• 1 января (pervogo yanvarya) - first of January
• 23 декабря (dvadtsat' tret'yego dekabrya) - twenty-third of December

Notice the endings: первого (not первый), пятнадцатого (not пятнадцатый). The ordinal is in genitive neuter because it agrees with the word число (date), which is neuter and stands in genitive after какого.

Full Date Format With Year

When you add the year, you put it in genitive too: пятнадцатого марта две тысячи пятого года (fifteenth of March, 2005, literally "of 2005 year").

The year число две тысячи пять becomes две тысячи пятого года in genitive. Only the last component (пять → пятого) declines as an ordinal.

For questions like "In what year?", you use prepositional case with the preposition в: в две тысячи пятом году (v dve tysyachi pyatom godu, in 2005).

Russian Case Rules for Prices and Money

When you're shopping, ordering food or discussing salaries, you need to know how to say numbers in russian with currency. The pattern depends on the number's ending, just like with regular nouns.

Let's use рубль (rouble) as example:

• 1, 21, 31, 101 рубль (nominative singular): один рубль, двадцать один рубль
• 2, 3, 4, 22, 33, 104 рубля (genitive singular): два рубля, тридцать четыре рубля
• 5-20, 25-30, 100, 1000 рублей (genitive plural): пять рублей, сто рублей, тысяча рублей

This is nominative case, when the price is the subject or you're simply stating it. But when you use prepositions or verbs that govern other cases, both the number and the currency word decline.

Prices in Different Cases

Imagine you're saying "with 500 roubles" (instrumental case with the preposition с). You can't just say *с пятьсот рублей*. You must decline both parts:

с пятьюстами рублями (s pyat'yustami rublyami).

Here, пятьсот (five hundred) becomes пятьюстами, and рублей becomes рублями. Both components of the number 500 decline: пять → пятью (instrumental) and сто → ста (but it becomes стами in instrumental when part of compound hundreds).

Another example: "I paid 3,000 roubles" uses the accusative (because платить takes accusative for the sum). Accusative of 3,000 рублей is три тысячи рублей (accusative equals nominative for inanimate). But "more than 3,000 roubles" uses genitive after больше: больше трёх тысяч рублей.

Does this feel overwhelming? You're not alone. Even advanced learners pause before declining larger sums. The good news: in casual speech, Russians sometimes simplify complex numbers, especially in instrumental and dative.

How to Say Phone Number in Russian Correctly

Phone numbers are the one area where russian numbers grammar relaxes a bit. You don't decline phone numbers, you simply read them digit by digit or in small groups.

Most Russians read phone numbers in pairs or short clusters: +7 926 123-45-67 would be read as:

плюс семь, девятьсот двадцать шесть, сто двадцать три, сорок пять, шестьдесят семь

(plyus sem', devyat'sot dvadtsat' shest', sto dvadtsat' tri, sorok pyat', shest'desyat sem').

Or, more casually, in pairs: девять-два-шесть, один-два-три, четыре-пять, шесть-семь (devyat'-dva-shest', odin-dva-tri, chetyre-pyat', shest'-sem').

Notice: when reading digits individually, you use nominative case for each number. No declension happens. This is one of the few places where counting in russian stays simple.

Asking for and Giving Your Number

The question is: Какой у вас номер телефона? (kakoy u vas nomer telefona?, What is your phone number?).

You answer: Мой номер [numbers] (moy nomer..., My number is...).

If someone asks you to write it down, they might say Запишите мой номер (zapishite moy nomer, Write down my number). In these constructions, номер телефона is in nominative or accusative (which looks identical for this inanimate noun), so you don't worry about declining the digits.

In official forms or documents, phone numbers appear as pure digits anyway. But for TORFL exams or real conversations, being able to fluently read a phone number in Russian shows solid command of russian cardinal numbers.

How to Decline Numbers in Russian Sentences: Age and Quantity

When you talk about your age, you use the dative case with the structure мне [number] [год/года/лет] (mne..., literally "to me [is]...").

The word for "year" changes based on the number:

• 1, 21, 31... год (nominative singular): Мне двадцать один год (I am 21 years old)
• 2, 3, 4, 22, 33... года (genitive singular): Мне тридцать четыре года (I am 34)
• 5-20, 25-30... лет (genitive plural): Мне пятнадцать лет (I am 15)

If you use a case other than nominative (for example, "at the age of 25"), you decline both the number and the time word:

в двадцать пять лет (v dvadtsat' pyat' let, at 25 years old, accusative/nominative)
к тридцати годам (k tridtsati godam, by the age of 30, dative)
после сорока лет (posle soroka let, after 40 years, genitive)

Notice that год becomes годам in dative plural when you're talking about reaching an age. This is a standard russian declension pattern for masculine nouns.

Quantities and Measures

The same principles apply when you count objects, distances or time periods. Russian case system explained through quantities makes the grammar come alive.

Examples:

• Я прочитал три книги (ya prochital tri knigi, I read three books, accusative)
• Я доволен тремя книгами (ya dovolen tremya knigami, I'm satisfied with three books, instrumental after доволен)
• Он живёт в пяти километрах отсюда (on zhivyot v pyati kilometrakh otsyuda, He lives five kilometers from here, prepositional after в)

Each case demands its own ending for both the numeral and the noun. That's why learners find russian numerals declension one of the hardest topics, right up there with verbs of motion.

Practical Exercises to Master Russian Numerals Rules

Reading tables helps, but real fluency comes from using numbers in context. Here are exercises you can practice alone or with a tutor.

Drill 1: Say Today's Date in Different Cases

Take today's date and form sentences requiring different cases:

• Nominative: Сегодня [date] (Today is...)
• Genitive: До [date] осталось три дня (Three days left until...)
• Prepositional: Встреча назначена на [date] (The meeting is scheduled for...)

This forces you to shift the ordinal number and month through multiple forms.

Drill 2: Convert Prices Across Cases

Pick a price, say 350 рублей. Write sentences:

• Nominative: Билет стоит 350 рублей (The ticket costs 350 roubles)
• Genitive: У меня нет 350 рублей (I don't have 350 roubles)
• Instrumental: Я заплатил 350 рублями (I paid with 350 roubles)
• Prepositional: Я говорю о 350 рублях (I'm talking about 350 roubles)

Check each ending carefully. If you're preparing for the TORFL exam, this kind of drill mirrors the grammar tasks you'll face.

Drill 3: Read Phone Numbers Aloud

Find five Russian phone numbers (from a website, advertisement or textbook). Practice reading them in pairs and as full numbers. Record yourself and compare with native pronunciation.

This builds automaticity with russian cardinal numbers and helps you sound natural in everyday exchanges.

Drill 4: Describe Ages in Context

Write sentences about people's ages using different cases:

• Мне 27 лет (I am 27)
• К 30 годам он уже... (By the age of 30 he already...)
• После 40 лет она начала... (After 40 she started...)

Mix in past, present and future tenses. This shows you how russian case endings interact with time expressions and verbs.

If you want structured feedback on these exercises, working with a tutor gives you immediate corrections and nuanced explanations that no app can match. You'll catch fossilized errors before they become habits.

Why Russian Grammar for Foreigners Feels So Different Here

You might wonder why Russian makes numbers so complicated. Most languages either don't decline numerals at all or treat them like adjectives. Russian developed a three-way split (1 / 2-4 / 5+) rooted in Old Slavic dual number forms, which disappeared elsewhere but left traces in how 2, 3, 4 behave.

Understanding the history won't make declension easier, but it reminds you that this isn't arbitrary. There's linguistic logic, even if it feels opaque at first.

For foreigners learning Russian, numbers sit at the intersection of morphology and syntax. You're not just memorizing endings, you're internalizing how quantity, case and agreement interact in every sentence. That's why mistakes with numbers persist even at advanced levels.

But here's the reality: natives tolerate errors with numerals more than with core verb aspects or case usage for animate objects. A foreigner saying *с пятьсот рублей* instead of *с пятьюстами рублями* will still be understood. Perfection comes gradually.

If you're serious about fluency, treat numbers as a long game. Master the simple patterns (1-10, common compounds), drill dates and prices until they're automatic, then expand to complex hundreds and thousands. The Pushkin Institute provides excellent reference materials for deeper study.

And if you've already studied the broader russian cases system, you'll notice numbers follow the same case meanings (genitive for absence, instrumental for means, etc.). The endings just look different.

Частые вопросы

How to say dates in russian

Use ordinal numbers in genitive neuter with the month in genitive. For example, "15 March" is пятнадцатого марта (pyatnadtsatoye marta). The structure answers "what date?" (какого числа?) and treats the date as a possession of the month. Add the year in genitive for full dates: пятнадцатого марта две тысячи пятого года.

How to say prices in russian

State the number followed by the currency in the appropriate form: один рубль (1), два рубля (2-4), пять рублей (5+). When using prepositions or verbs with specific cases, decline both the number and the currency: с пятьюстами рублями (with 500 roubles, instrumental). The number's ending determines the currency's form in nominative statements.

How to say phone numbers in russian

Read phone numbers digit by digit or in small groups using nominative case for each number. For example, +7 926 123-45-67 can be read as плюс семь, девятьсот двадцать шесть, сто двадцать три, сорок пять, шестьдесят семь, or more casually in pairs. You don't decline the digits, making phone numbers one of the simpler number tasks in Russian.

How to say your age in russian

Use the dative structure мне [number] [год/года/лет]. The time word changes: год after 1, 21, 31; года after 2, 3, 4, 22, 33; лет after 5-20, 25-30, etc. Example: Мне двадцать пять лет (I am 25 years old). For other cases, decline both number and time word: к тридцати годам (by age 30).

Why does russian have cases

Russian cases mark grammatical relationships between words in a sentence (subject, object, possession, location, instrument). This allows flexible word order while maintaining clarity about who does what to whom. Cases evolved from Proto-Indo-European and remained productive in Slavic languages. Numbers interact with cases because they modify nouns, and in Russian, both the modifier and noun must align grammatically.

How many cases are there in russian

Russian has six cases: nominative, genitive, dative, accusative, instrumental and prepositional. Each serves multiple functions. Nominative marks the subject, genitive shows possession or absence, dative indicates the indirect object, accusative marks the direct object, instrumental denotes the means or accompanying object, and prepositional is used with certain prepositions for location or topic. Numbers decline through all six cases, though some forms overlap.

Making Numbers Stick

You won't master russian numbers and cases in one sitting. This is material you absorb over months, through repeated exposure in real contexts. Each time you book an appointment, check a price tag or fill out a form in Russian, you're reinforcing these patterns.

Focus first on the numbers you use daily: your age, today's date, common prices, your phone number. Get those solid in nominative and one or two other cases. Then expand outward to hundreds, complex dates, and instrumental constructions.

If you feel stuck, remember that even Russian schoolchildren drill numerals for years. You're learning a system that natives internalized gradually through childhood. Give yourself that same patience. Work with a tutor who can correct you in real time, or use exercises that provide instant feedback on case endings.

The moment you correctly decline 347 in instrumental case without hesitation, you'll realize your brain has cracked the code. Until then, keep practicing, keep listening, and don't fear mistakes. Every declined number is a step toward fluency.

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