That's a really good example. Yes, if I'm doing my job and see a need to compute the sums of columns of the following numbers:
... would you just *assume* that the "B" and "D" were typos, or would you actually adapt your mind to the context of it likely being presented in hex? This is actually pretty common in my world. Maybe that's why I have a broader perspective on this. YMMV.
I run into it all the time as well but we are talking about the general population and not engineers. It's pretty obvious these people aren't thinking up an alternative order of operations. they just don't know them to begin with.