18°+2×32°30′ 如何计算?18°+2×32°30′;90°-47°30′÷5该怎么计算?

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18°+2×32°30′如何计算?18°+2×32°30′;90°-47°30′÷5该怎么计算?18°+2×32°30′如何计算?18°+2×32°30′;90°-47°30′÷5该怎么计算?18°+

18°+2×32°30′ 如何计算?18°+2×32°30′;90°-47°30′÷5该怎么计算?
18°+2×32°30′ 如何计算?
18°+2×32°30′;
90°-47°30′÷5
该怎么计算?

18°+2×32°30′ 如何计算?18°+2×32°30′;90°-47°30′÷5该怎么计算?
18°+2×32°30′;
=18°+64°+60’
=83°
90°-47°30′÷5
=90°-(45°+150')÷5
=90°-9°-30‘
=80°30’