• 2022-06-16 问题

    (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′).

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