[tex]2a)\\\\\frac{1}{2}+13-\frac{1}{4}=13\frac{1}{2}-\frac{1}{4}=13\frac{2}{4}-\frac{1}{4}=13\frac{1}{4}=\frac{53}{4}\\\\l\Liczba\ odwrotna\ do\ liczby :\ \ \frac{53}{4}\ \ to\ liczba\ \frac{4}{53}[/tex]
[tex]b)\\\\x=\frac{2}{3}-34+\frac{1}{6}= \frac{2}{3}-33\frac{3}{3}+\frac{1}{6}= -33\frac{1}{3}+\frac{1}{6}= -33\frac{2}{63}+\frac{1}{6}=-33\frac{1}{6}=-\frac{199}{6}\\\\Liczba\ odwrotna\ do\ liczby\ (-\frac{199}{6})\ \ to\ (-\frac{6}{199})[/tex]
