Răspuns:
a) 54°12'+10°23'=64°35'
b)40°40'+2°10'*2=40°40'+4°20'=45°
c)
[tex] \frac{13 \times 14}{2} - 90 = 13 \times 7 - 90 = 91 - 90 = 1 \: grad[/tex]
d)
[tex] \frac{14 \times 15}{2} \times \frac{1}{21} + 85 = 5+ 85 = 90 \: grade[/tex]
e)
[tex]1°1'(1+2+3+...+16)=1°1' \times \frac{16 \times 17}{2} = 8°8'*17=138°16'[/tex]
f) 180°-(24°24'-24°24')- 40°=180°-40°=140°
