Spatial with headings

Good day, Tung!

I had no trouble seeing your simbraille, and I appreciate your posting here with both the print and a proposed transcription.

As I understand it, your questions are:

1. Is it appropriate to use a transcriber-defined typeform for circled words?
2. Is it appropriate to use bold within a problem arranged spatially for calculation?
   • If not, then how might I transcribe numbers that are somehow set apart/emphasized in a problem arranged spatially for calculation?

1. Yes, I support and condone your use of a transcriber-defined typeform in UEB for circled text. This is in line with Braille Formats 2016 §5.9.
2. Although it is not directly supported by the Nemeth Code to use Nemeth bold for numerals within a spatial problem, your solution (including alignment which puts each bold indicator and its associated required numeric indicator in columns of their own) does seem readable and accurate.

Yes, I too would use the Nemeth Code's general omission indicator for a blank "box" in a problem when that box indicates a missing numeral (NC §58).

One additional note: The separation line which appears in an addition problem must be made one cell longer at either end than the overall width of the rest of the arrangement. (NC §178.c) So, I would make the line above the total in your example one cell longer.
Conversely, the column separation lines for "Tens" and "Ones" columns should be just the width of the column they head (BF2016 §11.4.2.b) [with the possible exception of letting your "Tens" column heading and separation line begin in cell 1].

Again, thank you for posting; and thank you for your time!
–Kyle