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Упрости отношения по образцу:

а) \(\cfrac{45\,\mathrm{км}}{60\,\mathrm{км}} = \cfrac{45}{60} = \cfrac{3}{4}\) ;

б) \(\cfrac{800\,\mathrm{ м}}{320\,\mathrm{ м}} = \) [ \(\frac{80\,\mathrm{м}}{320\,\mathrm{м}}\) | \(\,\frac{800\mathrm{м}}{32\,\mathrm{м}}\) | \(\frac{80\,\mathrm{м}}{32\,\mathrm{м}}\) ] \( = \) [ \(\frac{8}{32}\) | \(\frac{10}{4}\) | \(\frac{10}{32}\) ] \( = \) [ ];

в) \(\cfrac{9\,\mathrm{км}}{810\,\mathrm{м}} = \cfrac{9000\,\mathrm{ м}}{810\,\mathrm{ м}} = \cfrac{900}{81} = \cfrac{100}{9}\) ;

г) \(\cfrac{540\,\mathrm{ кг}}{6\,\mathrm{ т}} = \) [ \(\frac{540\,\mathrm{ кг}}{600\,\mathrm{ кг}}\) | \(\frac{54\,\mathrm{ т}}{6\,\mathrm{ т}}\) | \(\frac{540\,\mathrm{ кг}}{6000\,\mathrm{ кг}}\) ] \( = \) [ \(\frac{54}{600}\) | \(\frac{54}{60}\) | \(\frac{54}{6}\) ] \( = \) [ ];

д) \(\cfrac{2500\,\mathrm{ см}^2}{5\,\mathrm{ м}^2} = \) [ \(\frac{2500\,\mathrm{ см}^2}{500\,\mathrm{ см}^2}\) | \(\frac{2500\,\mathrm{ см}^2}{5000\,\mathrm{ см}^2}\) | \(\frac{2500\,\mathrm{ см}^2}{50~000\,\mathrm{ см}^2}\) ] \( = \) [ \(\frac{250}{500}\) | \(\frac{250}{5000}\) | \(\frac{250}{50}\) ] \( = \) [ ];

е) \(\cfrac{12\,\mathrm{ м}^3}{5~000~000\,\mathrm{ см}^3} = \) [ \(\frac{12\,\mathrm{ м}^3}{500\,\mathrm{ м}^3}\) | \(\frac{1200\,\mathrm{ cм}^3}{5~000~000\,\mathrm{ см}^3}\) | \(\frac{12\,\mathrm{ м}^3}{5\,\mathrm{ м}^3}\) ] \( = \) [ ].