spatial calculations in UEB technical code

Hello,

I have a book teaching Chisanbop (a method of calculating numbers using the fingers) to be transcribed in UEB technical code. I am finding the guidance for math in the UEB technical guidelines to be somewhat sparse, and I am hoping you can give me some additional help.

In the attached PDF, there is a page of simple single-digit addition problems, a page with longer numbers requiring carryovers which are indicated by boxes above the columns to be added, a page using dots and dots in circles which are explained on the page, and a page with multiplication problems with solid and dashed squares. The attached .BRF has my best guesses for how to format these situations. I apologize if my samples are all over the map. I tried a few different techniques for representing the odd shapes.

Page 1 Separation lines: I have notes from the NBA Conference in Louisville workshop in UEB technical material stating that the separation line should never include the sign of operation, but I cannot find anything in the codes to indicate this. Is there an accepted document of standards out there for this kind of situation?

For columns of single digits, if the separation line cannot be under the plus sign, would it make sense to repeat the numeric indicator for each number, rather than using the numeric passage indicator, since the separation line has to be two characters anyway?

Page 2 Carryover boxes: Would I use the square <span class="simbraille">$#d</span> and insert spaces between all the columns to accommodate the square symbol? Or is there a different way to handle blanks to be filled in? If I don't enclose the carryover numbers in squares, I can maybe use a global TN to indicate that "Carryover numbers which appear in squares in print are brailled in the row above the calculation and in a column to the left of the column of numbers to which each one applies."

Page 3 Dot and Circled Dot: The dot is not a multiplication sign, but an indication that the student should change which fingers are pressed on the table. Would the bullet symbol be appropriate? For the circled dot would I use <span class="simbraille">$=[_4</span>? Would this be spaced or unspaced from the digit? Alternatively, would this be a place to use the transcriber-defined print symbols?

Page 4 Solid and dashed squares: The solid squares are always carryover boxes and the dashed squares are column answers. In my attached sample I used the first and second transcriber-defined print symbols. How does this layout look?

Thanks for any guidance or suggestions.

Best,
Rebecca