(8分)计算:<br/>(1)18°20′32″+30°15′22″;<br/>(2)90°-77°54′36″-1°23″;<br/>(3)150.6°-(30°26′+59°48′).
(8分)计算:<br/>(1)18°20′32″+30°15′22″;<br/>(2)90°-77°54′36″-1°23″;<br/>(3)150.6°-(30°26′+59°48′).
1
(8分)计算:<br/>(1)18°20′32″+30°15′22″;<br/>(2)90°-77°54′36″-1°23″;<br/>(3)150.6°-(30°26′+59°48′).