1 Вычислите: a) \(\frac{3}{14}\) + \(\frac{7}{14}\); б) \(\frac{8}{15}\) + \(\frac{7}{15}\); в) \(\frac{7}{14}\) - \(\frac{3}{14}\); г) \(\frac{8}{15}\) - \(\frac{7}{15}\); д) \(\frac{6}{21}\) + \(\frac{10}{21}\) + \(\frac{13}{21}\); e) \(\frac{35}{48}\) - \(\frac{20}{48}\) + \(\frac{1}{48}\);

a) \(\frac{3}{14}\) + \(\frac{7}{14}\) = \(\frac{3+7}{14}\) = \(\frac{10}{14}\) = \(\frac{5}{7}\)

Ответ: \(\frac{5}{7}\)

б) \(\frac{8}{15}\) + \(\frac{7}{15}\) = \(\frac{8+7}{15}\) = \(\frac{15}{15}\) = 1

Ответ: 1

в) \(\frac{7}{14}\) - \(\frac{3}{14}\) = \(\frac{7-3}{14}\) = \(\frac{4}{14}\) = \(\frac{2}{7}\)

Ответ: \(\frac{2}{7}\)

г) \(\frac{8}{15}\) - \(\frac{7}{15}\) = \(\frac{8-7}{15}\) = \(\frac{1}{15}\)

Ответ: \(\frac{1}{15}\)

д) \(\frac{6}{21}\) + \(\frac{10}{21}\) + \(\frac{13}{21}\) = \(\frac{6+10+13}{21}\) = \(\frac{29}{21}\) = 1\(\frac{8}{21}\)

Ответ: 1\(\frac{8}{21}\)

e) \(\frac{35}{48}\) - \(\frac{20}{48}\) + \(\frac{1}{48}\) = \(\frac{35-20+1}{48}\) = \(\frac{16}{48}\) = \(\frac{1}{3}\)

Ответ: \(\frac{1}{3}\)