Ответ:

  1. \(\frac{14}{120}+\frac{56}{120}+\frac{90}{120}=\frac{160}{120}=1\frac{40}{120}=1\frac{1}{3}\).
  2. \(\frac{18}{10}-\frac{10}{10}+\frac{7}{10}=\frac{15}{10}=1\frac{5}{10}=1\frac{1}{2}\).
  3. \(\frac{3}{12}+\frac{3}{12}+\frac{3}{12}+\frac{3}{12}=\frac{12}{12}=1\).
  4. \(\frac{10}{6}+\frac{10}{6}+\frac{10}{6}+\frac{10}{6}=\frac{40}{6}=6\frac{4}{6}=6\frac{2}{3}\).