Much like one huge difference between string "42" and the number 42 is that the latter can have math done to it. If you want to avoid the arithmetic, label tasks with words like "simple", "small", "quick", or my favorite "Won't fix".
I actually agree with your comment but this part made me laugh out loud because JavaScript :) ("42" - 1 === 41 but "42" + 1 === "421")