The compensation strategy is a method making an operation (adding and subtraction) simplier.
From the problem :
[tex]39+54[/tex]Add 1 to 39, this will become 40
[tex]40+54=94[/tex]Then subtract 1 to the answer to make inverse or reverse the number that you added earlier.
[tex]94-1=93[/tex]The answer is 93
