(31°51′-25°4′30″)×3+28°3′÷2 ( 结果化为度)
问题描述:
(31°51′-25°4′30″)×3+28°3′÷2 ( 结果化为度)
答
(31°51′-25°4′30″)×3+28°3′÷2
=(31°50′60″-25°4′30″)×3+28°3′÷2
=6°46′30″×3+28°3′÷2
=6.775°×3+28.05°÷2
=34.35°
秒先化为分÷60,再化为度÷60