Odpowiedź:
[tex]\frac{3}{9}-\frac{1}{12}=\frac{1}{3}-\frac{1}{12}=\frac{4}{12}-\frac{1}{12}=\frac{3}{12}=\frac{1}{4}\\\\\frac{2}{6}-\frac{2}{9}=\frac{1}{3}-\frac{2}{9}=\frac{3}{9}-\frac{2}{9}=\frac{1}{9}\\\\\frac{6}{7}-\frac{2}{3}=\frac{18}{21}-\frac{14}{21}=\frac{4}{21}\\\\\frac{6}{8}-\frac{4}{6}=\frac{3}{4}-\frac{2}{3}=\frac{9}{12}-\frac{8}{12}=\frac{1}{12}\\\\5\frac{4}{10}-4\frac{3}{25}=5\frac{2}{5}-4\frac{3}{25}=5\frac{10}{25}-4\frac{3}{25}=1\frac{7}{25}[/tex]
[tex]\frac{4}{21}\ \ \ \ \ \ \frac{1}{9}\ \ \ \ \ \ \frac{1}{12}\ \ \ \ \ \ 1\frac{7}{25}\ \ \ \ \frac{1}{4}\\\\W\ \ \ \ O\ \ \ \ \ \ \ \ L\ \ \ \ \ \ \ \ I\ \ \ \ N[/tex]
