计算(1)52°38′+21°49′(2)18°43′26″*4要过程

问题描述:

计算(1)52°38′+21°49′(2)18°43′26″*4要过程

(1)52°38′+21°49′=(52°+21°)+(38'+49')=73°+87'=73°+1°27'=73°27'
(2)18°43′26″*4
=(18°x4)+(43'x4)+(26''x4)
=72°+169'+104''
=72°+2°29'+1'44''
=74°30'44''