(数学)计算.175°16'30''-47°30'÷6+4°12'50''×3

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(数学)计算.175°16'30''-47°30'÷6+4°12'50''×3

(数学)计算.175°16'30''-47°30'÷6+4°12'50''×3
(数学)计算.175°16'30''-47°30'÷6+4°12'50''×3

(数学)计算.175°16'30''-47°30'÷6+4°12'50''×3
175°16'30''-47°30'÷6+4°12'50''×3
=175°16'30''-42°330'÷6+(4×3)°(12×3)')50×3)''
=175°16'30''-(42÷6)°(330÷6)'+12°36'150''
=175°16'30''+12°38'30''-7°55'
=(175+12)°(16+38)'(30+30)''-7°55'
=179°55'-7°55'
=172°