32.68°—28°41'55"
=32°40'48''—28°41'55"
=31°99'108''-28°41'55"
=31-28°99-41'108-55'
=33°58'53"我要减法的过程，和分秒的换算32°40'48''=31° 100'48''=31°99'108''分秒的换算60进位