№5. Вычислите: 1) 1/10 + 11/15; 2) 4/18 + 5/12; 3) 2/15 + 4/25; 4) 3/16 + 5/24.

1. \(\frac{1}{10}+\frac{11}{15}=\frac{3}{30}+\frac{22}{30}=\frac{25}{30}=\frac{5}{6}\);
2. \(\frac{4}{18}+\frac{5}{12}=\frac{8}{36}+\frac{15}{36}=\frac{23}{36}\);
3. \(\frac{2}{15}+\frac{4}{25}=\frac{10}{75}+\frac{12}{75}=\frac{22}{75}\);
4. \(\frac{3}{16}+\frac{5}{24}=\frac{9}{48}+\frac{10}{48}=\frac{19}{48}\).

Ответ: 1) 5/6; 2) 23/36; 3) 22/75; 4) 19/48.