Задание №4. Размести дроби в порядке возрастания: 67/68, 9/13, 8/7, 6/9, 7/22, 8/15, 7/19, 5/21.

Сравним дроби по их значениям: \(\frac{5}{21}\approx0.238\), \(\frac{7}{22}\approx0.318\), \(\frac{7}{19}\approx0.368\), \(\frac{8}{15}\approx0.533\), \(\frac{6}{9}\approx0.667\), \(\frac{9}{13}\approx0.692\), \(\frac{67}{68}\approx0.985\), \(\frac{8}{7}\approx1.143\).

Ответ: \(\frac{5}{21}<\frac{7}{22}<\frac{7}{19}<\frac{8}{15}<\frac{6}{9}<\frac{9}{13}<\frac{67}{68}<\frac{8}{7}\).