4.179 Найдите сумму:

Краткое пояснение:

Пошаговое решение:

1. a) \( -\frac{5}{11} + \left(-\frac{2}{11}\right) = -\left(\frac{5}{11} + \frac{2}{11}\right) = -\frac{7}{11} \)
2. б) \( -\frac{7}{8} + \left(-\frac{1}{4}\right) = -\left(\frac{7}{8} + \frac{1}{4}\right) = -\left(\frac{7}{8} + \frac{2}{8}\right) = -\frac{9}{8} \)
3. в) \( -\frac{4}{5} + \left(-\frac{2}{3}\right) = -\left(\frac{4}{5} + \frac{2}{3}\right) = -\left(\frac{12}{15} + \frac{10}{15}\right) = -\frac{22}{15} \)
4. г) \( -\frac{2}{9} + \left(-\frac{5}{6}\right) = -\left(\frac{2}{9} + \frac{5}{6}\right) = -\left(\frac{4}{18} + \frac{15}{18}\right) = -\frac{19}{18} \)