Răspuns:
[tex] \frac{17}{28} + \frac{5}{18} - ( \frac{3}{28} - \frac{13}{18} ) = [/tex]
[tex] = \frac{17}{28} + \frac{5}{18} - \frac{3}{28} + \frac{13}{18} = [/tex]
[tex] = \frac{14}{28} + \frac{18}{18} = [/tex]
[tex] = \frac{1}{2} + 1 = \frac{3}{2} [/tex]
