Susan,

Thank you for your question! I appreciate your citing a section of Rules of UEB ????????????

I see that the directions in the example you shared say, “Write the decimal point in each product so that the equation is correct.”

Thus, I am comfortable saying the spaces in the situation you shared are, as part of RUEB §6.6 says, “a separator in a single number.”

And so it would make great sense to use the numeric space.

Consequently, item b from your example might look as follows:

braille: #j4ec”8#e “7 #b”f”e

print: b. 0.53×5 = 2 6 5

Braille on!
–Kyle