Решение:
\(\frac{20}{8} = \frac{5}{2} = 2\frac{1}{2}\)
\(\frac{15}{10} = \frac{3}{2} = 1\frac{1}{2}\)
\(\frac{28}{21} = \frac{4}{3} = 1\frac{1}{3}\)
\(\frac{10}{6} = \frac{5}{3} = 1\frac{2}{3}\)
\(\frac{14}{4} = \frac{7}{2} = 3\frac{1}{2}\)
Ответ: \(2\frac{1}{2}, 1\frac{1}{2}, 1\frac{1}{3}, 1\frac{2}{3}, 3\frac{1}{2}\)
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