Вариант 3: 1) \(\frac{2}{9}+\frac{2}{16}\); 2) \(\frac{5}{6}+\frac{11}{18}\); 3) \(\frac{7}{11}+\frac{6}{33}\); 4) \(\frac{8}{9}+\frac{5}{16}\); 5) \(\frac{3}{5}+\frac{2}{15}\); 6) \(\frac{8}{17}+\frac{1}{34}\); 7) \(\frac{1}{4}+\frac{1}{6}\); 8) \(\frac{5}{8}+\frac{1}{10}\); 9) \(\frac{7}{9}+\frac{1}{6}\); 10) \(\frac{2}{21}+\frac{3}{14}\).

Чтобы сложить дроби, приводим их к общему знаменателю, складываем числители и сокращаем результат.

1. \(\frac{2}{9}+\frac{2}{16}=\frac{32}{144}+\frac{18}{144}=\frac{50}{144}=\frac{25}{72}\).
2. \(\frac{5}{6}+\frac{11}{18}=\frac{15}{18}+\frac{11}{18}=\frac{26}{18}=\frac{13}{9}=1\frac{4}{9}\).
3. \(\frac{7}{11}+\frac{6}{33}=\frac{21}{33}+\frac{6}{33}=\frac{27}{33}=\frac{9}{11}\).
4. \(\frac{8}{9}+\frac{5}{16}=\frac{128}{144}+\frac{45}{144}=\frac{173}{144}=1\frac{29}{144}\).
5. \(\frac{3}{5}+\frac{2}{15}=\frac{9}{15}+\frac{2}{15}=\frac{11}{15}\).
6. \(\frac{8}{17}+\frac{1}{34}=\frac{16}{34}+\frac{1}{34}=\frac{17}{34}=\frac{1}{2}\).
7. \(\frac{1}{4}+\frac{1}{6}=\frac{3}{12}+\frac{2}{12}=\frac{5}{12}\).
8. \(\frac{5}{8}+\frac{1}{10}=\frac{25}{40}+\frac{4}{40}=\frac{29}{40}\).
9. \(\frac{7}{9}+\frac{1}{6}=\frac{14}{18}+\frac{3}{18}=\frac{17}{18}\).
10. \(\frac{2}{21}+\frac{3}{14}=\frac{4}{42}+\frac{9}{42}=\frac{13}{42}\).