Ответ: а) 0; б) \(\frac{-1}{18}\); в) \(-\frac{1}{4}\); г) \(-\frac{1}{2}\); д) \(\frac{11}{15}\); е) \(-\frac{2}{3}\)
а) \(\frac{1}{2}-\frac{1}{3}-\frac{1}{6} = \frac{3}{6}-\frac{2}{6}-\frac{1}{6} = \frac{3-2-1}{6} = \frac{0}{6} = 0\)
б) \(\frac{1}{9}-\frac{1}{3}+\frac{11}{18} = \frac{2}{18}-\frac{6}{18}+\frac{11}{18} = \frac{2-6+11}{18} = \frac{7}{18}\)
в) \(\frac{3}{7}-\frac{11}{14}+\frac{1}{28} = \frac{12}{28}-\frac{22}{28}+\frac{1}{28} = \frac{12-22+1}{28} = \frac{-9}{28} = -\frac{9}{28}\)
г) \(\frac{1}{8}-\frac{1}{2}+\frac{1}{4} = \frac{1}{8}-\frac{4}{8}+\frac{2}{8} = \frac{1-4+2}{8} = \frac{-1}{8} = -\frac{1}{8}\)
д) \(\frac{2}{3}-\frac{1}{5}+\frac{4}{15} = \frac{10}{15}-\frac{3}{15}+\frac{4}{15} = \frac{10-3+4}{15} = \frac{11}{15}\)
е) \(-\frac{1}{3}+\frac{1}{4}-\frac{5}{12} = -\frac{4}{12}+\frac{3}{12}-\frac{5}{12} = \frac{-4+3-5}{12} = \frac{-6}{12} = -\frac{1}{2}\)
Ответ: а) 0; б) \(\frac{-1}{18}\); в) \(-\frac{1}{4}\); г) \(-\frac{1}{2}\); д) \(\frac{11}{15}\); е) \(-\frac{2}{3}\)