Решение:
- \( \frac{1}{15} + \frac{7}{15} = \frac{1+7}{15} = \frac{8}{15} \)
- \( \frac{7}{19} - \frac{1}{19} = \frac{7-1}{19} = \frac{6}{19} \)
- \( \frac{15}{29} - \frac{9}{29} = \frac{15-9}{29} = \frac{6}{29} \)
- \( \frac{37}{100} - \frac{28}{100} = \frac{37-28}{100} = \frac{9}{100} \)
- \( \frac{9}{16} + \frac{5}{16} = \frac{9+5}{16} = \frac{14}{16} = \frac{7}{8} \)
- \( \frac{7}{20} + \frac{1}{20} = \frac{7+1}{20} = \frac{8}{20} = \frac{2}{5} \)
Ответ: а) \( \frac{8}{15} \); б) \( \frac{6}{19} \); в) \( \frac{6}{29} \); г) \( \frac{9}{100} \); д) \( \frac{7}{8} \); е) \( \frac{2}{5} \).