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CourseGrammarWords
  1. Home
  2. ›Grammar
  3. ›A1
  4. ›Numbers
NumeriA1

Numbers

Cardinal numbers 0-100, ordinals 1st-10th

Learning Goal

Can use numbers 0-100 and ordinals 1st-10th

Exam Skills:AscoltoParlato

Look at these examples. Can you spot the grammar pattern?

Ho ventuno anni.

I am twenty-one years old.

Un caffè costa un euro e cinquanta.

A coffee costs one euro and fifty cents.

È la prima volta in Italia.

It's the first time in Italy.

Pay attention to the highlighted parts. What do they have in common?

I numeri cardinali da 0 a 20:

0 zero5 cinque10 dieci15 quindici
1 uno6 sei11 undici16 sedici
2 due7 sette12 dodici17 diciassette
3 tre8 otto13 tredici18 diciotto
4 quattro9 nove14 quattordici19 diciannove

Decine: 20 venti, 30 trenta, 40 quaranta, 50 cinquanta, 60 sessanta, 70 settanta, 80 ottanta, 90 novanta, 100 cento.

Numeri composti: La vocale finale della decina cade davanti a uno e otto: ventuno (21), ventotto (28), trentuno (31), quarantotto (48).

Numeri ordinali (1°-10°):

1° primo/a4° quarto/a7° settimo/a10° decimo/a
2° secondo/a5° quinto/a8° ottavo/a
3° terzo/a6° sesto/a9° nono/a

Gli ordinali concordano in genere e numero: la prima volta, il secondo piano.

Apply this grammar in A1 course exercises

Practice Exercises
Forgetting to drop the final vowel of tens before uno/otto: ventuno (not *ventiuno), ventotto (not *ventiotto). 🇬🇧 English speakers: Number system is straightforward. The vowel-dropping rule is the main challenge. Ordinals agree in gender (unlike English).

Common Error Patterns

Not dropping the final vowel before uno/otto in compound numbers

Drop final vowel of tens before uno/otto: ventuno, ventotto, trentuno, quarantotto. NOT *ventiuno, *ventiotto.

Ordinal number not agreeing in gender with the noun

Ordinals are adjectives — they agree: il primo giorno (M), la prima volta (F), i primi giorni (M.pl.), le prime volte (F.pl.).

Ho ventuno anni.

I am twenty-one years old.

Ventuno (not *ventiuno) — final vowel of venti drops before uno.

Un caffè costa un euro e cinquanta.

A coffee costs one euro and fifty cents.

Uno and cinquanta — basic number usage with prices.

È la prima volta in Italia.

It's the first time in Italy.

Ordinal primo/a agrees in gender: la prima volta (feminine).

Practice in course

Apply this grammar in A1 course exercises

A1 Course
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Put it into practice

Try a free exercise from the course

1. The alphabet and greetings

Frequently asked questions

When is Numeri used?
Decine: 20 venti, 30 trenta, 40 quaranta, 50 cinquanta, 60 sessanta, 70 settanta, 80 ottanta, 90 novanta, 100 cento.
How is Numeri formed?
Numeri composti: La vocale finale della decina cade davanti a uno e otto: vent uno (21), vent otto (28), trent uno (31), quarant otto (48). Gli ordinali concordano in genere e numero: la prima volta, il secondo piano .
What are common mistakes with Numeri?
Forgetting to drop the final vowel of tens before uno/otto: ventuno (not *ventiuno), ventotto (not *ventiotto). 🇬🇧 English speakers: Number system is straightforward. The vowel-dropping rule is the main challenge. Ordinals agree in gender (unlike English). 🇷🇺 Russian speakers: Russian numbers work differently with cases. Italian numbers are simpler. Ordinal agreement is familiar. 🇨🇿 Czech speakers: Czech number-noun agreement is complex. Italian is simpler. The vowel drop in ventuno/ventotto needs practice.

Related grammar topics

  • Alfabeto e pronuncia