a)
44°33'44" + 55°55'55" = (44+55)°(33+55)'(44+55)"=
=99°88'99" = 99°(60+28)'(60+39)" = (99+1)°(28+1)'39" = 100°29'39"
b)
48°48' + 48°48' + 48°48' + 48°48' = 4 × (48°48')=(4×48)°(4×48)' =
=192°192' = 192°(3×60+12)' = (192+3)°12' = 195°12'
c)
48''
d)
20°40'59" + 5°5"48' = 20°40'59" + 5°48'5" =
=(20+5)°(40+48)'(59+5)"=25°88'64" =
=25°(60+28)'(60+4)" = (25+1)°(28+1)'4" = 26°29'4"
e)12°49'59" + 1°55" + 22°54'=(12+1+22)°(49+54)'(59+55)" =
= 35°103'114" = 35°(60+43)'(60+54)" = (35+1)°(43+1)'54" = 36°44'54"