)are declined as nouns, and their multiples are treated as number+noun combinations ("dwa tysiące" "two thousand" behaves like "dwa miesiące" "two months", and so on).In compound numbers only the last part of the number is inflected, except when there are both tens and units, in which case both of those are inflected, and when "jeden", which is indeclinable in all compound numbers, is the last part of the number, in which case the second to last part is inflected.