Peculiarities in the Use of Numerals.
[81]. 1. The compounds from 21 to 99 may be expressed either with the larger or the smaller numeral first. In the latter case, et is used. Thus:—
trīgintā sex or sex et trīgintā, thirty-six.
2. The numerals under 90, ending in 8 and 9, are often expressed by subtraction; as,—
duodēvīgintī, eighteen (but also octōdecim);
ūndēquadrāgintā, thirty-nine (but also trīgintā novem or novem et trīgintā).
3. Compounds over 100 regularly have the largest number first; the others follow without et; as,—
centum vīgintī septem, one hundred and twenty-seven.
annō octingentēsimō octōgēsimō secundō, in the year 882.
Yet et may be inserted where the smaller number is either a digit or one of the tens; as,—
centum et septem, one hundred and seven;
centum et quadrāgintā, one hundred and forty.
4. The Distributives are used—