数学题目,会的帮忙做下一.已知∠α＝32.68°,∠β＝18°41′55″,求∠α与∠β的差（结过用度、分、秒表示,步骤

∠α-∠β＝32.68°-18°41′55″
=﹙32º+0.68×60`-18°41′55″
=32°40.8′-18°41′55″
=32°40′48″-18°41′55″
=31°99′108″-18°41′55″
=13°58′53″
57.53º=57º＋0.53×60′=57º31.8′=57°31′48″
36°23′45″
=36º+﹙23+45÷60﹚′
＝36°＋23.75′
＝36°＋﹙23.75÷60﹚°≈36.3958°
360°÷7
=51°＋3°／7
=51°＋180′／7
=51°25′＋5′／7
=51°25′＋300″／7
≈51°25′43″