40度16'31"+34度18'42"

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40度16'31
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40度16'31"+34度18'42"
40度16'31"+34度18'42"

40度16'31"+34度18'42"
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''

40度16'31"+34度18'42"=74度35'13"