25°36′*4等于几 39°48′+41°37′等于几

问题描述:

25°36′*4等于几 39°48′+41°37′等于几

25°36′*4
=100°144′
=100°(120+24)′
=102°24′
39°48′+41°37′
=80°85′
=80°(60+25)′
=81°25′