a) \(\frac{7}{12} + \frac{2}{12}\) б) \(\frac{5}{24} + \frac{17}{24}\) в) \(\frac{8}{39} + \frac{26}{39}\) г) \(\frac{43}{75} + \frac{19}{75}\)

a) \(\frac{7}{12} + \frac{2}{12} = \frac{7+2}{12} = \frac{9}{12} = \frac{3}{4}\)

б) \(\frac{5}{24} + \frac{17}{24} = \frac{5+17}{24} = \frac{22}{24} = \frac{11}{12}\)

в) \(\frac{8}{39} + \frac{26}{39} = \frac{8+26}{39} = \frac{34}{39}\)

г) \(\frac{43}{75} + \frac{19}{75} = \frac{43+19}{75} = \frac{62}{75}\)

Ответ: a) \(\frac{3}{4}\); б) \(\frac{11}{12}\); в) \(\frac{34}{39}\); г) \(\frac{62}{75}\)