Выполните действия: д) 5/12 + 1/6; е) 3/5 − 4/15; ж) 19/21 − 11/15; з) 5/42 + 10/63; и) 11/21 + 2/26; к) 5/24 − 7/60.

1. д) \(\frac{5}{12}+\frac{1}{6}=\frac{5}{12}+\frac{2}{12}=\frac{7}{12}\).
2. е) \(\frac{3}{5}-\frac{4}{15}=\frac{9}{15}-\frac{4}{15}=\frac{5}{15}=\frac{1}{3}\).
3. ж) \(\frac{19}{21}-\frac{11}{15}=\frac{95}{105}-\frac{77}{105}=\frac{18}{105}=\frac{6}{35}\).
4. з) \(\frac{5}{42}+\frac{10}{63}=\frac{15}{126}+\frac{20}{126}=\frac{35}{126}=\frac{5}{18}\).
5. и) \(\frac{11}{21}+\frac{2}{26}=\frac{11}{21}+\frac{1}{13}=\frac{143}{273}+\frac{21}{273}=\frac{164}{273}\).
6. к) \(\frac{5}{24}-\frac{7}{60}=\frac{25}{120}-\frac{14}{120}=\frac{11}{120}\).

Ответ: д) \(\frac{7}{12}\); е) \(\frac{1}{3}\); ж) \(\frac{6}{35}\); з) \(\frac{5}{18}\); и) \(\frac{164}{273}\); к) \(\frac{11}{120}\).