| A | B |
|---|
| unus, -a, -um | one |
| duo, duae, duo | two |
| tres, tria | three |
| quattuor | four |
| quinque | five |
| sex | six |
| septem | seven |
| octo | eight |
| novem | nine |
| decem | ten |
| undecim (spelling change) | eleven |
| duodecim | twelve |
| tredecim | thirteen |
| quattuordecim | fourteen |
| quindecim | fifteen |
| sedecim (notice x drops out) | sixteen |
| septendecim (notice final m of #7 changes to n) | seventeen |
| duodeviginti (literally, 2 down from 20) | eighteen |
| undeviginti | nineteen |
| viginti | twenty |
| unius (genitive singular for all 3 genders) | of one |
| uni (dative sing. for all 3 genders) | to/for one |
| unum (accusative sing. masc. & neut.) | one |
| unam (accusative sing. fem.) | one |
| uno (ablative sing. for masc. and neut.) | by/with/from one |
| una (ablative sing. fem) | by/with/ from one |
| duo (nom. plural masc. & neut) | two |
| duae (nom. pl. fem.) | two |
| duorum (gen. pl. masc. & neut) | of two |
| duarum (gen. pl. fem. ) | of two |
| duobus (dative and abl. plural masc. & neut) | to/for two & b/w/f/ two |
| duabus (dative and ablative plur. fem.) | to/for two & b/w/f two |
| tres (nom. & acc. masc/fem. plural) | three |
| tria (nom. & acc. plural neuter) | three |
| trium (gen. pl. all 3 genders) | of three |
| tribus (dative and ablative plural all 3 genders) | to/for three & b/w/f three |
