Ответ:
- \(\frac{11}{17}+\frac{3}{17}=\frac{11+3}{17}=\frac{14}{17}\);
- \(\frac{39}{100}+\frac{12}{100}=\frac{39+12}{100}=\frac{51}{100}\);
- \(\frac{7}{15}-\frac{3}{15}=\frac{7-3}{15}=\frac{4}{15}\);
- \(\frac{9}{17}-\frac{1}{17}=\frac{9-1}{17}=\frac{8}{17}\);
- \(\frac{5}{7}-\frac{2}{7}=\frac{5-2}{7}=\frac{3}{7}\);
- \(\frac{8}{10}-\frac{7}{10}=\frac{8-7}{10}=\frac{1}{10}\).
