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82问答网 > 计算：90°-78°19′40″=______；64°37′12″=______°

计算：90°-78°19′40″=；64°37′12″=°

计算：90°-78°19′40″=______；64°37′12″=______°．

2025-03-15 13:51:16

推荐回答（1个）

回答1：

90°-78°19′40″=89°59′60″-78°19′40″=11°40′20″；
∵12″÷60=0.2′，
37.2′÷60=0.62°
∴64°37′12″=64.62°．
故答案为11°40′20″；64.62°．

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