103.3°+176°42'-98.34°怎么算.要过程 还有24°22'36"×3 怎么算 147°45’÷5怎么算啊
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103.3°+176°42′-98.34°

=103.3°+[176°+(42/60)°]-98.34°

=103.3°+176.7°-98.34°

=280°-98.34°

=181.66°

=181°+(0.66×60)′

=181°+39.6′

=181°+39′+(0.6×60)″

=181°+39′+36″

=181°39′36″

24°22′36″×3

=(24°+22′+36″)×3

=24°×3+22′×3+36″×3

=72°+66′+108″

=72°+60′+6′+60″+48″

=73°+7′+48″

=73°7′48″

147°45′÷5

=(147°+45′)×1/5

=(145°+120′+45′)×1/5

=(145°+165′)×1/5

=145°×1/5+165′×1/5

=29°+33′

=29°33′