把33.28°化成度、分、秒得_;108°20′42″=_度.

问题描述:

把33.28°化成度、分、秒得______;108°20′42″=______度.

33.28°=33°+60′×0.28=33°+16′+60″×0.8=33°16′48″.
108°20′42″=108°+20′+(42÷60)′=108°+(20.7÷60)°=108.345°.
故选C.故填:33°16′48″;108.345.