1. Вычислите: а) \(\frac{5}{18}+\frac{5}{18}\); б) \(\frac{6}{5}-\frac{5}{6}\); в) \(\frac{7}{25}+\frac{4}{5}\); г) \(\frac{11}{48}-\frac{11}{64}\).

1. \(\frac{5}{18}+\frac{5}{18}=\frac{10}{18}=\frac{5}{9}\).
2. \(\frac{6}{5}-\frac{5}{6}=\frac{36}{30}-\frac{25}{30}=\frac{11}{30}\).
3. \(\frac{7}{25}+\frac{4}{5}=\frac{7}{25}+\frac{20}{25}=\frac{27}{25}=1\frac{2}{25}\).
4. \(\frac{11}{48}-\frac{11}{64}=\frac{44}{192}-\frac{33}{192}=\frac{11}{192}\).

Ответ: а) \(\frac{5}{9}\); б) \(\frac{11}{30}\); в) \(1\frac{2}{25}\); г) \(\frac{11}{192}\).