Explicație pas cu pas:
[tex]a) \frac{2}{3} + \frac{5}{12} = \frac{8}{12} + \frac{5}{12} = \frac{13}{12} [/tex]
[tex]b) \frac{1}{8} + \frac{3}{4} = \frac{1}{8} + \frac{6}{8} = \frac{7}{8} [/tex]
[tex]e) \frac{2}{7} + \frac{3}{14} + \frac{5}{28} = \frac{8}{28} + \frac{6}{28} + \frac{5}{28} = \frac{19}{28} [/tex]
[tex]f) \frac{5}{6} + \frac{1}{4} + \frac{7}{12} = \frac{10}{12} + \frac{3}{12} + \frac{7}{12} = \frac{20}{12} [/tex]
