52°45′-32°46′=______°______′.
52°45′-32°46′=______°______′.
27.24°=______度______分______秒,108°21′36″=______度.
22.5°=______度______分;12°24′=______度.
18°______′24°______′32°______′11′______〃19′______〃22′______〃
计算:33°52′+21°54′=______度______分.
(1)39.56°=______°______′______″(2)65°25′12″=______°.
3.76°=______度 ______分 ______秒.
计算:80°32′15″+90°27′45″=______;100°-36°18′52″=______.
23°17′45″的余角是______,补角是______.
90°-46°27′=______,180°-42°35′29″=______.
180°-56°42′32″=______,25°54′÷3=______.
45°=______直角=______平角=______周角.