Ответ:

  1. \(0,7+\frac{1}{3}=\frac{7}{10}+\frac{1}{3}=\frac{21}{30}+\frac{10}{30}=\frac{31}{30}=1\frac{1}{30}\).
  2. \(0,8+\frac{1}{7}=\frac{4}{5}+\frac{1}{7}=\frac{28}{35}+\frac{5}{35}=\frac{33}{35}\).
  3. \(\frac{2}{3}-0,2=\frac{2}{3}-\frac{1}{5}=\frac{10}{15}-\frac{3}{15}=\frac{7}{15}\).
  4. \(\frac{1}{6}-0,1=\frac{1}{6}-\frac{1}{10}=\frac{5}{30}-\frac{3}{30}=\frac{1}{15}\).
  5. \(0,15+\frac{1}{5}=\frac{15}{100}+\frac{20}{100}=\frac{35}{100}=\frac{7}{20}\).
  6. \(0,8-\frac{11}{20}=\frac{4}{5}-\frac{11}{20}=\frac{16}{20}-\frac{11}{20}=\frac{5}{20}=\frac{1}{4}\).
  7. \(\frac{1}{4}-0,12=\frac{25}{100}-\frac{12}{100}=\frac{13}{100}\).
  8. \(\frac{11}{25}+0,13=\frac{44}{100}+\frac{13}{100}=\frac{57}{100}\).
  9. \(0,22+\frac{7}{30}=\frac{11}{50}+\frac{7}{30}=\frac{33}{150}+\frac{35}{150}=\frac{68}{150}=\frac{34}{75}\).
  10. \(\frac{3}{7}-0,25=\frac{3}{7}-\frac{1}{4}=\frac{12}{28}-\frac{7}{28}=\frac{5}{28}\).

Ответ: 1) \(1\frac{1}{30}\); 2) \(\frac{33}{35}\); 3) \(\frac{7}{15}\); 4) \(\frac{1}{15}\); 5) \(\frac{7}{20}\); 6) \(\frac{1}{4}\); 7) \(\frac{13}{100}\); 8) \(\frac{57}{100}\); 9) \(\frac{34}{75}\); 10) \(\frac{5}{28}\).