Решим примеры на сложение дробей.
а) \(\frac{1}{15} + \frac{7}{15} = \frac{1+7}{15} = \frac{8}{15}\)
б) \(\frac{6}{13} + \frac{5}{13} = \frac{6+5}{13} = \frac{11}{13}\)
в) \(\frac{11}{30} + \frac{13}{30} = \frac{11+13}{30} = \frac{24}{30} = \frac{4 \times 6}{5 \times 6} = \frac{4}{5}\)
г) \(\frac{27}{100} + \frac{52}{100} = \frac{27+52}{100} = \frac{79}{100}\)
Ответ: a) \(\frac{8}{15}\); б) \(\frac{11}{13}\); в) \(\frac{4}{5}\); г) \(\frac{79}{100}\)