FAM: Lesson - Cardinal Numbers

Cardinal Numbers

In additional to Roman numerals, you will need to be familiar with the cardinal numbers in Latin. Cardinal numbers are adjectives and are used for counting (one, two, three, etc.). For Latin 1, please take the time to become familiar with the following numbers:

Cardinal Numbers Chart

1-10	11-20	30-100 (by decades); 1000
unus, una, unum - one duo, duae, duo - two tres, tres, tria - three quattuor - four quinque - five sex - six septem - seven octo - eight novem - nine decem - ten	undecim - eleven duodecim - twelve tredecim - thirteen quattuordecim - fourteen quindecim - fifteen sedecim - sixteen septendecim - seventeen duodeviginti - eighteen undeviginti - nineteen viginti - twenty	triginta - thirty quadraginta - forty quinquaginta - fifth sexaginta - sixty septuaginta - seventy octoginta - eighty nonaginta - ninety centum - one hundred mille - one thousand

Nota bene:

• Did you notice what happened for 18 and 19? For 11-17, we used the ones digit (modified) and added -decim (unus + decim = undecim). But for 18 and 19, we use viginti (20) and subtract from it:
  • duodeviginti = 18
    • duo = 2
    • de = from
    • viginti = 20
  • undeviginti - one from twenty = 19
• Every -8 and -9 digit will work like this in the tens by adding duode- or unde- to the decade. Additional examples:
  • duodetriginta = 28 (two from 30)
  • undenonaginta = 89 (one from 90)