Răspuns:
a)
[tex]1 + \frac{2}{7} = \frac{1 \times 7 + 2}{7} = \frac{9}{7} [/tex]
b)
[tex] \frac{6}{5} - \frac{10}{25} = \frac{30 - 10}{25} = \frac{20}{25} = \frac{4}{5} [/tex]
c)
[tex] \frac{5}{2} + \frac{2}{3} = \frac{19}{6} = 3 \frac{1}{6} [/tex]
d)
[tex] \frac{7}{2} + \frac{19}{7} = \frac{87}{14} = 6 \frac{3}{14} [/tex]
