Выполните сложение обыкновенных дробей. Вариант 3: 1) 3/8 + 7/16; 2) 5/6 + 11/18; 3) 7/11 + 5/33; 4) 8/9 + 5/18; 5) 3/5 + 2/15; 6) 8/17 + 1/34; 7) 1/4 + 1/6.

1. \(\frac{3}{8}+\frac{7}{16}=\frac{6}{16}+\frac{7}{16}=\frac{13}{16}\).
2. \(\frac{5}{6}+\frac{11}{18}=\frac{15}{18}+\frac{11}{18}=\frac{26}{18}=1\frac{4}{9}\).
3. \(\frac{7}{11}+\frac{5}{33}=\frac{21}{33}+\frac{5}{33}=\frac{26}{33}\).
4. \(\frac{8}{9}+\frac{5}{18}=\frac{16}{18}+\frac{5}{18}=\frac{21}{18}=1\frac{1}{6}\).
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. \(\frac{1}{4}+\frac{1}{6}=\frac{3}{12}+\frac{2}{12}=\frac{5}{12}\).

Ответ: 1) \(\frac{13}{16}\); 2) \(1\frac{4}{9}\); 3) \(\frac{26}{33}\); 4) \(1\frac{1}{6}\); 5) \(\frac{11}{15}\); 6) \(\frac{1}{2}\); 7) \(\frac{5}{12}\).