Miss
Miss.
"Young, Lady" or call her by name.
Mademoiselle is French for "miss", the formal address for an unmarried young woman.
Misses or Mlles
Depending on how young the girl is you would be more informal with her. You address her with "du" and say "Hallo" instead of "Guten Tag".
i think a child.preteen ages are 11 or something. <><><><> The formal term of address is Miss. As in Miss Julia Brown, age 9.
Was the Gettysburgs address was written in formal English
When addressing letters to juveniles, you can use "Dear [First Name]" as a formal and friendly salutation. Avoid using terms like "Miss" or "Mr." unless the juvenile has expressed a preference for a more formal mode of address. Remember to be understanding and compassionate in your communication.
Formal
In a formal setting, you should address a professor as "Professor Last Name" or simply "Professor."
In a formal setting, you address a former president as "Mr. President" or "Madam President."
Any age as long as they're not married ... if they are married then you call them Mrs.