计算52°20′+39°58′21″ 180°-51°18′36″ 25°36′47″×7 41°36′÷3(1.)52°20′+39°58′21″(2) 180°-51°18′36″(3)25°36′47″×7(4)41°36′÷3

问题描述:

计算52°20′+39°58′21″ 180°-51°18′36″ 25°36′47″×7 41°36′÷3
(1.)52°20′+39°58′21″
(2) 180°-51°18′36″
(3)25°36′47″×7
(4)41°36′÷3

(1)52°20′+39°58′21″
=91°+78‘+21“
=92°18‘21“
(2) 180°-51°18′36″
=179°59′60″-51°18′36″
=128°41′24″
(3)25°36′47″×7
=175°+252’+329”
=179°17‘29”
(4)41°36′÷3
=39°156’÷3
=13°52’