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2. Calculaţi:
a) 21°43'50" +4°4'14" = ...";
c) 11°10'48" +23°58'38"=.........";
e) 18°59" +59'1" = ...;
b) 23'38"+53'25"=......";
d) 18°26'32"+20°30" =...";
f) 28°59'1"+59"=....