I am transcribing a worksheet with the title A-100. It is just columns of 100 linear addition problems. For the title, I don't know if the A is an abbreviation, but it could possibly stand for addition. How would you suggest to braille it?
The Nemeth Code says that when there is doubt as to whether or not a construction is an abbreviation, it must be treated as if it were not an abbreviation. So in this case, I would use a letter indicator on the A, but no numeric indicator on the 100. Rule II §11d says the numeric indicator must not be used after a hyphen if the hyphen follows a letter.