?
F to C: +40, x5/9, -40
C to F: +40, x9/5, -40
Dec. 2002 is not proving to be a good vintage.
www.google.com, search for “celsius fahrenheit conversion” gives in the caption of the fourth hit:
hehehe…thanks for the help — I know it wasn’t much of a challenge, but I had the window open while I was chatting w/someone.