a)
[tex]\frac{1}{2} - \frac{1}{4} = \frac{2}{4} - \frac{1}{4} = \frac{1}{4} [/tex]
[tex] \frac{5}{6} - \frac{2}{3} = \frac{5}{6} - \frac{4}{6} = \frac{1}{6} [/tex]
[tex] \frac{3}{4} - \frac{3}{8} = \frac{6}{8} - \frac{3}{8} = \frac{3}{8} [/tex]
b)
[tex]3 \frac{5}{9} - \frac{1}{6} = 3 \frac{10}{18} - \frac{3}{18} = 3 \frac{7}{18} [/tex]
[tex]1 \frac{3}{4} - \frac{5}{6} = 1 \frac{9}{12} - \frac{10}{12} = \frac{21}{12} - \frac{10}{12} = \frac{11}{12} [/tex]
[tex]2 \frac{1}{9} - 1 \frac{5}{6} = 2 \frac{2}{18} - 1 \frac{15}{18} = 1 \frac{20}{18} - 1 \frac{15}{18} = \frac{5}{18} [/tex]
Myślę że pomogłem ;)
