a) \(\frac{8}{25} + \frac{7}{25} + \frac{9}{25}\)
\(\frac{8}{25} + \frac{7}{25} + \frac{9}{25} = \frac{8 + 7 + 9}{25} = \frac{24}{25}\)
б) \(\frac{13}{15} - (\frac{8}{15} + \frac{4}{15}\)
\(\frac{13}{15} - (\frac{8}{15} + \frac{4}{15}) = \frac{13}{15} - \frac{12}{15} = \frac{1}{15}\)
в) \((\frac{17}{100} + \frac{27}{100}) - (\frac{8}{100} + \frac{3}{100})\)
\((\frac{17}{100} + \frac{27}{100}) - (\frac{8}{100} + \frac{3}{100}) = \frac{44}{100} - \frac{11}{100} = \frac{33}{100}\)
Ответ: а) \(\frac{24}{25}\); б) \(\frac{1}{15}\); в) \(\frac{33}{100}\)