There are four central aspects to the Latin numeral:

- The cardinal:
**ūnus, duo, trēs, quattuor** - The ordinal:
**prīmus, secundus, tertius, quārtus** - The distributive:
**singulī, bīnī, ternī, quaternī** - The adverb:
**semel, bis, ter, quater**

The numerals 11-19 are indeclinable:

- note that 18 and 19 start counting
*back*from twenty, while the others count*up*from ten - French and Spanish (and other Romance languages?) also seem to freak out and shift form somewhere after 15; I’m not sure why no one thought a standardized 11-19 was a good idea

The numerals 20-100 are expressed as follows; bases of ten *do not* decline:

To achieve a number like 85, the Romans have two preferred methods:

- tens+ ones= (
**octōgintā quīnque mīlitēs**) - ones +
**et**+ tens =(**quīnque et octōgintā mīlitēs**) - note that
**octōgintā et quīnque**(a third option) is less common, but may appear - also, note that numbers like 28 and 29 nine
*subtract*as 18 and 19 above:**duodētrīgintā****, ūndētrīgintā, ūndēoctōgintā**(79), etc.

The hundreds *above *100 decline as adjectives like **bonus, bona, bonum**

**Mille **is an odd bird: it’s indeclinable as a singular (**mīlle mīlitēs**) but declines as a *neuter *plural (**tria mīlia mīlitum**)

- Note that there’s no typo here (though I am prone to typos): the singular
**mīlle**has two**l**‘s; the plural**mīlia/mīlium/mīlibus/mīlia/mīlibus**has only one. - He came with a thousand soldiers:
**cum mīlle mīlitibus vēnit**. - To express this sentence with
*three*thousand, we decline**tria mīlia**and make**mīles**a partitive gentive - He cam with three thousand soldiers:
**cum tribus mīlibus mīlitum vēnit**.

To express numbers with three digits or more:

If **et **appears anywhere, it appears only between the two highest demoninations:

- 1776:
**mīlle (et) septigentī septuāgintā sex** - 2012:
**duo mīlia (et) duodecim**