计算:15°37′+42°51′=______.
计算:15°37′+42°51′=______.
计算:33°18′=______°.
计算:33°52′+21°54′=______度______分.
计算:153°19′42″+26°40′28″=______.
计算:80°32′15″+90°27′45″=______;100°-36°18′52″=______.
计算:18°15′36″=______°;118°18′-66°23′=______.
计算:57.32°=______度______分______秒.
计算:78°46′14″-36°50′=______.
计算:48°39′+67°31′=______.
计算23°53′×3+107°43′÷5=______.
计算:108°18′-56°23′=______.
计算:98°45′36″+71°22′34″=______.