Answer:
[tex] \frac{3}{4} + \frac{2}{5} = \frac{23}{20} [/tex]
[tex] \frac{13}{7} + \frac{3}{2} = \frac{47}{14} [/tex]
[tex] \frac{4}{5} + \frac{9}{7} = \frac{73}{35} [/tex]
[tex] \frac{3}{2} + \frac{4}{3} = \frac{17}{6} [/tex]
[tex] \frac{5}{7} + \frac{1}{4} = \frac{27}{28} [/tex]
[tex] \frac{5}{2} - \frac{2}{7} = \frac{31}{14} [/tex]
[tex] \frac{4}{3} - \frac{1}{2 } = \frac{5}{6} [/tex]
[tex] \frac{8}{5} - \frac{5}{10} = \frac{11}{10} [/tex]
[tex] \frac{12}{5} - \frac{7}{7} = \frac{7}{5} [/tex]