40度16'31"+34度18'42"
问题描述：
40度16'31"+34度18'42"
答
40度16'31"+34度18'42"
=(40度+34度)+(16'+18')+(31''+42'')
=74度+34'+73'' (注：73''=1'13'')
=74度35'13''能问一下34°18'25"-18°19'26"34°18'25"-18°19'26" =33°78'25''-18°19'26'' =33°77''85''-18°19'26'' =(33°-18°)+(77'-19')+(85''-26'') =15°+58'+59'' =15°58'59''