Most learners meet the cardinals 2–4 and 5+ through their famous nominative quirk: два, три, чоти́ри take the nominative plural of the noun (два бра́ти), while п’ять and up take the genitive plural (п’ять брати́в). That rule is real — but it applies only in the nominative and the inanimate accusative. The moment the phrase moves into any other case — "with two brothers," "about three sisters," "to five students" — a completely different system takes over: the numeral itself declines, and the noun simply agrees with it in that case. So з двома́ брата́ми, not *з два брати́. This page gives the full oblique forms of два / три / чоти́ри / п’ять, the agreement they force on the noun, and the one irregular form (чотирма́) you have to memorise.
The core rule: the numeral declines, the noun agrees
In the nominative the number governs the noun's case (два + nom.pl., п’ять + gen.pl.). In every oblique case that machinery switches off. Instead, the whole phrase takes the case the sentence demands, the numeral declines, and the noun lands in the same case in the plural. There is no more "2-vs-5 split" because the noun is no longer chosen by the number — it is just matched to the case.
| Case of the phrase | 'two brothers' | What happens |
|---|---|---|
| Nominative | два бра́ти | 2 + nom. pl. (the famous rule) |
| Genitive | двох брати́в | both genitive |
| Dative | двом брата́м | both dative |
| Instrumental | (з) двома́ брата́ми | both instrumental |
| Locative | (на/при) двох брата́х | both locative |
In з двома́ брата́ми there is no nominative plural anywhere: двома́ (instr. of два) drags брата́ми (instr. pl. of брат) into the instrumental with it. Learn this principle and the rest is just memorising the numeral forms.
Я приї́хав з двома́ важки́ми валі́зами — ле́две доні́с.
I arrived with two heavy suitcases — I barely carried them. — instrumental: двома́ + валі́зами, the whole phrase in one case.
Розкажи́ про трьох найкра́щих учні́в кла́су.
Tell me about the three best pupils in the class. — про + accusative; animate, so трьох + учні́в (= genitive form).
Два / дві, три, чоти́ри: the shared pattern
These three decline alike, and there are two things to flag. First, два (masc./neut.) and дві (fem.) lose their gender distinction the moment they go oblique — both collapse into двох. Second, чоти́ри has an irregular instrumental чотирма́, not the *чотирьома́ you'd predict from трьома́.
| Case | два / дві | три | чоти́ри |
|---|---|---|---|
| Nominative | два / дві | три | чоти́ри |
| Genitive | двох | трьох | чотирьо́х |
| Dative | двом | трьом | чотирьо́м |
| Accusative | = nom. / двох | = nom. / трьох | = nom. / чотирьо́х |
| Instrumental | двома́ | трьома́ | чотирма́ ⚠️ |
| Locative | (на) двох | трьох | чотирьо́х |
The accusative follows animacy, the usual way: with an animate noun it copies the genitive (ба́чив трьох дру́зів "saw three friends"), with an inanimate noun it copies the nominative (купи́в три столи́ "bought three tables").
Ми сиді́ли за столо́м з трьома́ ро́дичами й говори́ли до пі́вночі.
We sat at the table with three relatives and talked until midnight. — instrumental трьома́ + ро́дичами.
Він керу́є чотирма́ ві́дділами одноча́сно.
He runs four departments at once. — irregular instrumental чотирма́, not *чотирьома́.
Я роздав я́блука трьом мале́ньким ді́тям.
I handed out apples to three little children. — dative трьом + ді́тям, both dative.
На двох сті́льцях лежа́ли пальта́ госте́й.
The guests' coats lay on two chairs. — locative двох after на; inanimate, but the oblique numeral still declines.
П’ять: two parallel forms
From п’ять up to два́дцять (and три́дцять), the numerals decline like a soft -ь noun (the тінь pattern), and each oblique case has two accepted standard forms — a shorter one (п’яти́) and a longer one (п’ятьо́х):
| Case | п’ять |
|---|---|
| Nominative | п’ять |
| Genitive | п’яти́ / п’ятьо́х |
| Dative | п’яти́ / п’ятьо́м |
| Accusative | п’ять / п’ятьо́х (animate) |
| Instrumental | п’ятьма́ / п’ятьома́ |
| Locative | (на) п’яти́ / п’ятьо́х |
Both columns are correct standard Ukrainian. As a rule of thumb, the longer -ьо́х / -ьо́м / -ьома́ forms are preferred with people and animate nouns (про п’ятьо́х студе́нтів), while the shorter п’яти́ forms feel a touch more numerical and (formal) (до п’яти́ ро́ків "up to five years"). Don't agonise — pick one and stay consistent within a phrase.
Дити́на навчи́лася рахува́ти до п’яти́ — ра́дості нема́є меж.
The child has learned to count to five — there's no end to the joy. — genitive п’яти́ (the numerical, shorter form) after до.
Я познайо́мився з п’ятьма́ нови́ми коле́гами за пе́рший день.
I met five new colleagues on the very first day. — instrumental п’ятьма́ + коле́гами.
Виклада́ч роздав за́вдання п’ятьо́м студе́нтам, що спізни́лися.
The lecturer handed assignments to the five students who were late. — dative п’ятьо́м (animate, the longer form) + студе́нтам.
У п’ятьо́х містах краї́ни одноча́сно відкри́ли ви́ставку.
The exhibition opened simultaneously in five cities of the country. — locative п’ятьо́х + містах after у.
The noun agrees: same case, plural
Once the numeral is oblique, the noun's job is simple: take the same case in the plural. This is where learners most often stall, because they remember the nominative "after 2, nominative plural; after 5, genitive plural" rule and try to apply it everywhere. In oblique cases it does not apply at all — the noun just mirrors the numeral.
| Numeral (instr.) |
| Meaning |
|---|---|---|
| двома́ | дру́зями | with two friends |
| трьома́ | кни́жками | with three books |
| чотирма́ | рука́ми | with four hands |
| п’ятьма́ | хлопця́ми | with five boys |
Вона́ ди́ригувала орке́стром із п’ятьма́ деся́тками музика́нтів.
She conducted an orchestra of fifty musicians. — п’ятьма́ деся́тками, both instrumental.
З двома́ дру́зями завжди́ веселі́ше, ніж само́му.
It's always more fun with two friends than alone. — з двома́ дру́зями: numeral and noun both instrumental.
Where the oblique forms turn up most
Three everyday environments pull these numerals into oblique cases, so they are worth rehearsing as ready-made blocks. The first is the preposition до "up to / until," which governs the genitive and is constant in talking about ages, deadlines, and ranges: до двох ро́ків "up to two years," до трьох годи́н "until three o'clock," до п’яти́ "up to five." The second is the preposition з "with," which governs the instrumental and is where the irregular чотирма́ and the parallel п’ятьма́ / п’ятьома́ show up constantly: з двома́, з трьома́, з чотирма́, з п’ятьма́. The third is the dative of the indirect object — "give / show / explain to so many people" — where you reach for двом, трьом, чотирьо́м, п’ятьо́м. If you drill these three frames, you cover the great majority of real oblique uses.
Дити́ні ще нема́є й двох ро́ків, а вона́ вже бі́гає.
The child isn't even two yet, and she's already running. — до/нема́є governs the genitive двох ро́ків.
Поясни́ це ще раз отим трьом нови́м праці́вникам.
Explain this once more to those three new employees. — dative трьом + праці́вникам.
Source-language comparison
For an English speaker, this is genuinely alien, because English numbers never change: two, three, four, five are frozen, and only the noun ever pluralises. In Ukrainian the number is a declining word — двох, трьом, чотирма́, п’ятьома́ — and it drags the noun into its case. The trap is muscle memory: you learn "два + plural noun" early, then keep producing з два брати́ forever. The fix is a hard mental switch — in any oblique case, *first decline the numeral, then put the noun in the same case, plural. There is also no English analogue to the animacy split in the accusative (ба́чив трьох дру́зів vs купи́в три столи́), so that has to be learned outright.
For a Russian speaker, the paradigms are close but leak in exactly the dangerous spots. Ukrainian instrumental is двома́, трьома́, чотирма́ — note чотирма́, not the Russian четырьмя́ — and the п’ятьма́ / п’ятьома́ pair both exist in standard Ukrainian. The apostrophe in п’ять, п’яти́, п’ятьма́ is obligatory. Lean on the structural similarity, but verify every Ukrainian spelling and stress rather than transliterating the Russian.
Common Mistakes
❌ з два брати́
The numeral didn't decline — in an oblique phrase both words inflect: з двома́ брата́ми (instrumental throughout).
✅ з двома́ брата́ми
with two brothers — двома́ + брата́ми, both instrumental.
❌ з чотирьома́ дру́зями
Wrong instrumental of 'four' — it's the irregular чотирма́, not *чотирьома́: з чотирма́ дру́зями.
✅ з чотирма́ дру́зями
with four friends — irregular instrumental чотирма́.
❌ Дав за́вдання п’ять студе́нтам.
The numeral must be dative here — give to five students: дав за́вдання п’ятьо́м студе́нтам.
✅ Дав за́вдання п’ятьо́м студе́нтам.
Gave the assignment to five students — dative п’ятьо́м + студе́нтам.
❌ про трьох дру́зів, але́ книжка́х двох (mixing the rule)
In oblique cases the 2-vs-5 noun rule is gone — the noun just matches the numeral's case: про двох дру́зів, у двох книжка́х. Don't reach for the genitive-plural rule.
✅ у двох книжка́х
in two books — locative двох + книжка́х, the noun simply agrees.
❌ Я бачив три дру́зів.
Animate accusative — with animate nouns the accusative copies the genitive: Я ба́чив трьох дру́зів.
✅ Я ба́чив трьох дру́зів.
I saw three friends — animate, so accusative = genitive трьох дру́зів.
Key Takeaways
- Outside the nominative/accusative, the numeral declines and the noun agrees in the same case, plural — з двома́ дру́зями, про трьох сесте́р.
- The famous 2-vs-5 noun rule applies only in the nominative and inanimate accusative; it disappears in oblique cases.
- Forms to memorise: два/дві → двох / двом / двома́; три → трьох / трьом / трьома́; чоти́ри → чотирьо́х / чотирьо́м / чотирма́ (irregular instrumental); п’ять → п’яти́·п’ятьо́х, п’ятьма́·п’ятьома́.
- чотирма́ is the one irregular form — not *чотирьома́.
- The accusative follows animacy: ба́чив трьох дру́зів (animate = gen.) but купи́в три столи́ (inanimate = nom.).
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Start learning Ukrainian→Related Topics
- Declining the NumeralsB2 — How the cardinals themselves inflect across the cases — оди́н (одного́/одному́/одни́м), два/три/чоти́ри (двох/двом/двома́), п’ять (п’яти́·п’ятьо́х, п’ятьма́·п’ятьома́), the single-form со́рок/сто (сорока́/ста), and the both-parts hundreds (двохсо́т) — so you can count in oblique cases, where the numeral declines and the noun simply agrees.
- Numeral–Noun Agreement (The Hard Part)B1 — The notorious three-way rule: after 1 (and …1) the noun is nominative SINGULAR, after 2/3/4 (and …2/3/4) nominative PLURAL with the dual-reflex end-stress (два столи́, дві сестри́), and after 5+ genitive PLURAL — chosen by the LAST digit, and applying only when the whole phrase is nominative or inanimate-accusative.
- Cardinal Numbers 1–20A1 — The numbers нуль to два́дцять — with the gendered оди́н/одна́/одне́ and два/дві, the fused -на́дцять teens, and the apostrophe/soft-sign spelling traps (п’ять, шість, ві́сім, де́в’ять) that make Ukrainian numerals an orthography test from day one.
- The Seven Cases: OverviewA1 — Ukrainian has SEVEN cases — nominative, genitive, dative, accusative, instrumental, locative, and a living vocative — each marked by an ending on the noun rather than by word order, so the same job English does with prepositions and position, Ukrainian does with the word's tail.
- Adjective Agreement in All CasesB1 — Every modifier in a Ukrainian noun phrase — possessive, demonstrative, and adjective alike — agrees with the head noun in gender, number, AND case all at once. Decline a full phrase like мій нови́й украї́нський друг through all seven cases (gen мого́ ново́го украї́нського дру́га, dat моє́му ново́му украї́нському дру́гові, instr мої́м нови́м украї́нським дру́гом) and the agreement chain falls into place: change the case of the noun, and every word in front of it changes to match.