1填空
1）121°36'36"
=121°(36+36/60)'
=121°36.6'
=(121+36.6/60)°
=121.61°
2）90°-43°42'
=46°18'
2计算
1）180°-(75°40'23"+31°35'49")
=180°-106°75'72"
=180°-107°16'12"
=72°43'48"
2）24°14'24"+55.48°
=24°14'24"+55°(0.48*60)'
=24°14'24"+55°28.8'
=24°14'24"+55°28'(0.8*60)"
=24°14'24"+55°28'48"
=79°42'72"
=79°43'12"
3）123°24'-60°36'42"
=62°47'18"
3计算（结果化为度,分,秒的形式）
1）36°24'36"×3；
=108°72'108"
=108°73'48"
=109°13'48"
2）22.38°÷4
=5.595°
=5°(0.595*60)'
=5°35.7'
=5°35'(0.7*60)"
=5°35'42"