HP48 and HMS Addition Formula
I have a fixed value (0?ø28??37?) that I need to rotate a paper map by. I know my trusty HP48 has a way to program one of the soft keys to be a formula, taking the value in Row 1 and add that fixed value to it.
So I need to type in a value in HH.MMSS, convert it to decimal, subtract my fixed value, and then convert back to HH.MMSS.
I used to program this thing all the time (20 years ago) but cannot seem to get it to work. I know I can do this in excel, but it would be easier in the long run if I could do it with my HP also. Anybody have any assistance??
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