I numeri cardinali (The cardinal numbers)
| zero | 0 | zero |
| uno, una | 1 | one |
| due | 2 | two |
| tre | 3 | three |
| quattro | 4 | four |
| cinque | 5 | five |
| sei | 6 | six |
| sette | 7 | seven |
| otto | 8 | eight |
| nove | 9 | nine |
| dieci | 10 | ten |
| undici | 11 | eleven |
| dodici | 12 | twelve |
| tredici | 13 | thirteen |
| quattordici | 14 | fourteen |
| quindici | 15 | fifteen |
| sedici | 16 | sixteen |
| diciassette | 17 | seventeen |
| diciotto | 18 | eighteen |
| diciannove | 19 | nineteen |
| venti | 20 | twenty |
| ventuno | 21 | twenty-one |
| ventidue | 22 | twenty-two |
| ventitrè | 23 | twenty-three |
| ventiquattro | 24 | twenty-four |
| venticinque | 25 | twenty-five |
| ventisei | 26 | twenty-six |
| ventisette | 27 | twenty-seven |
| ventotto | 28 | twenty-eight |
| ventinove | 29 | twenty-nine |
| trenta | 30 | thirty |
| trentuno | 31 | thirty-one |
| trentadue | 32 | thirty-two |
| trentatrè | 33 | thirty-three |
| trentaquattro | 34 | thirty-four |
| trentacinque | 35 | thirty-five |
| trentasei | 36 | thirty-six |
| trentasette | 37 | thirty-seven |
| trentotto | 38 | thirty-eight |
| trentanove | 39 | thirty-nine |
| quaranta | 40 | forty |
| quarantuno | 41 | forty-one |
| quarantadue | 42 | forty-two |
| quarantatrè | 43 | forty-three |
| quarantotto | 48 | forty-eight (and so on...) |
| cinquanta | 50 | fifty |
| sessanta | 60 | sixty |
| settanta | 70 | seventy |
| ottanta | 80 | eighty |
| novanta | 90 | ninety |
| cento | 100 | one hundred |
Note that to form a two-digit number above 20, such as 64, you
just add the second digit to the first digit
("sessanta"+"quattro"="sessantaquattro").
However, when the second digit begins in a vowel, such as 48, you
drop the final vowel of the first digit
("quaranta"+"otto"="quarantotto").