Question

Calculate the sun or difference show work plz!!

Answer 1

*sum

Answer 2

Unless I misunderstand the question, this is addition and subtraction, right?
I drew out the calculations I used, and I can explain the process in more detail if you'd like

Answer 3

Although, I get the feeling that I might be missing something? The smaller numbers to the right of the main numbers (I think they're called subscripts)--do they affect the answer? I ignored them just now, but if they're important, then I may have misunderstood the problem