Вопрос:

Вариант 3. 1. Выполните действия: 1) \(\frac{7}{24}+\frac{8}{24}\); 2) \(\frac{9}{20}-\frac{5}{20}\); 3) \(\frac{8}{19}+\frac{5}{19}-\frac{4}{19}\); 4) \(\frac{25}{37}-\frac{11}{37}+\frac{5}{37}\).

Ответ:

  1. \(\frac{7}{24}+\frac{8}{24}=\frac{15}{24}=\frac{5}{8}\).
  2. \(\frac{9}{20}-\frac{5}{20}=\frac{4}{20}=\frac{1}{5}\).
  3. \(\frac{8}{19}+\frac{5}{19}-\frac{4}{19}=\frac{9}{19}\).
  4. \(\frac{25}{37}-\frac{11}{37}+\frac{5}{37}=\frac{19}{37}\).

Ответ: 1) \(\frac{5}{8}\); 2) \(\frac{1}{5}\); 3) \(\frac{9}{19}\); 4) \(\frac{19}{37}\).