4. Найдите значение выражений: 5/9 + 3/27; 16/17 + 3/34; 15/16 − 1/48; 4/22 − 1/88.

1. \(\frac{5}{9}+\frac{3}{27}=\frac{5}{9}+\frac{1}{9}=\frac{6}{9}=\frac{2}{3}\).
2. \(\frac{16}{17}+\frac{3}{34}=\frac{32}{34}+\frac{3}{34}=\frac{35}{34}=1\frac{1}{34}\).
3. \(\frac{15}{16}-\frac{1}{48}=\frac{45}{48}-\frac{1}{48}=\frac{44}{48}=\frac{11}{12}\).
4. \(\frac{4}{22}-\frac{1}{88}=\frac{16}{88}-\frac{1}{88}=\frac{15}{88}\).

Ответ: \(\frac{2}{3};\ 1\frac{1}{34};\ \frac{11}{12};\ \frac{15}{88}\).