46°42'+35.4°-28°27'16''等于好多!

问题描述:

46°42'+35.4°-28°27'16''等于好多!

原式=46°42'+35°24'-28°27'16''
=82°6'-28°27'16''
=81°65'60''-28°27'16''
=53°38'44