Cardinal Numbers in Italian and Latin

Here is a look at cardinal (or counting) numbers in Italian and Latin. The Italian numbers are bold, while the Latin numbers are italicized. One of the most noticeable and consistent changes is in the endings. Italian removes the Latin number's nasal or alveolar final consonant. Another consistency is where the Latin has a double plosive, "pt", "ct" or "tt", Italian has "tt". What's less consistent is where the smaller number goes. For instance, in 17 diciassette - septendecim, the "10" precedes the "7" in Italian, but follows in Latin: in Italian 17=10+7; in Latin 17=7+10. In Latin, for 18 and 19, the smaller number is first and taken away from the larger. For Latin numbers from 21-99, the larger number precedes.

1 uno - unus
2 due - duo
3 tre - tres
4 quattro - quattuor
5 cinque - quinque
6 sei - sex
7 sette - septem
8 otto - octo
9 nove - novem
10 dieci - decem
11 undici - undecim
12 dodici - duodecim
13 tredici - tredecim
14 quattordici - quattuordecim
15 quindici - quindecim
16 sedici - sedecim
17 diciassette - septendecim
18 diciotto - duodeviginti
19 diciannove - undeviginti
20 venti - viginti
21 ventuno - viginti unus
30 trenta - triginta
40 quaranta - quadraginta
50 cinquanta - quinquaginta
60 sessanta - sexaginta
70 settanta - septuaginta
80 ottanta - octoginta
90 novanta - nonaginta
100 cento - centum