几道数学题,(计算)1.37°49’+44°28’2.108°18’-56.5°3.89°35’+20°25’4.123°24’-60°36’

问题描述:

几道数学题,(计算)
1.37°49’+44°28’
2.108°18’-56.5°
3.89°35’+20°25’
4.123°24’-60°36’

1.37°49’+44°28’
=81°77’
=82°17’
2.108°18’-56.5°
=108°18’-56°30’
=107°78’-56°30’
=51°48’
3.89°35’+20°25’
=109°60’
=110°
4.123°24’-60°36’
=122°84’-60°36’
=62°48’