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计算.(1)90°-40°56′; (2)38°45′+72.5°(结果用度表示)
人气:435 ℃ 时间:2019-10-08 21:19:02
解答
(1) 49°4′ = (49 + 4/60)° = 49.0667°
(2) 38°45′+72.5° = (38 + 45/60)° + 72.5° = 38.75° + 72.5° = 111.25°
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