Răspuns:
Explicație pas cu pas:
[tex] \frac{ {}^{2)} 1}{2} + \frac{1}{4} = \frac{2}{4} + \frac{1}{4}= \frac{2 + 1}{4} = \frac{3}{4} \\ [/tex]
___________
[tex] \frac{ {}^{2)} 1}{3} + \frac{5}{6} = \frac{2}{6} + \frac{5}{6}= \frac{2 + 5}{6} = \frac{7}{6} \\ [/tex]
___________
[tex] \frac{ {}^{2)} 1}{4} + \frac{3}{8} = \frac{2}{8} + \frac{3}{8}= \frac{2 + 3}{8} = \frac{5}{8} \\ [/tex]
___________
[tex] \frac{ {}^{2)} 2}{5} + \frac{3}{10} = \frac{4}{10} + \frac{3}{10} =\frac{4 + 3}{10} = \frac{7}{10} \\ [/tex]
___________
[tex] \frac{ {}^{3)} 3}{4} + \frac{ {}^{2)} 5}{6}= \frac{9}{12} + \frac{10}{12} = \frac{9 + 10}{12} = \frac{19}{12} \\ [/tex]
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[tex] \frac{ {}^{9)} 5}{7} + \frac{ {}^{7)} 4}{9} =\frac{45}{63} + \frac{28}{63} =\frac{45 + 28}{63} = \frac{73}{63} \\ [/tex]
