Ход решения
Например:
а) \(\frac{1}{2}\) и \(\frac{3}{5}\);
б) \(-0,8\) и \(-0,85\);
в) 2,121 и 2,125;
г) \(-3,175\) и \(-3,171\). Проверка: \(\frac{1}{3}\)<\(\frac{1}{2}\)<\(\frac{3}{5}\)<\(\frac{2}{3}\); \(-\frac{8}{9}\)<\(-0,85\)<\(-0,8\)<\(-\frac{7}{9}\); 2,12<2,121<2,125<2,13; \(-3,18\)<\(-3,175\)<\(-3,171\)<\(-3,17\).