Template:U:hu:compound-numeral-adjectives

Compound adjectives with a numeral and the name of a unit (as in “a one-hour walk” or “a three-storey building”) are written as solid if both constituents are single words, e.g., from and ). By contrast, if either element is a compound word (or both of them are), their compound will be written as separate words, e.g. ), from  +  or , from  +. (See also the analogous rule for material designations.) In practice, this rule is sometimes disregarded, especially in casual texts and in case of less common compounds.

The in round tens are suffixes, so e.g.  is written as solid. On the other hand, compounds with a number always written separately, e.g. . Also, adjectives (and nouns) for the denomination of coins, banknotes, and revenue stamps are written as solid, e.g., despite having the compound.