Odpowiedź:
[tex]a)\ \ 1-\frac{4}{7}=\frac{7}{7}-\frac{4}{7}=\frac{3}{7}\\\\b)\ \ 1-\frac{2}{5}=\frac{5}{5}-\frac{2}{5}=\frac{3}{5}\\\\c)\ \ 2-\frac{5}{8}=1\frac{8}{8}-\frac{5}{8}=1\frac{3}{8}\\\\d)\ \ 6-\frac{3}{4}=5\frac{4}{4}-\frac{3}{4}=5\frac{1}{4}\\\\e)\ \ 8-1\frac{6}{7}=7\frac{7}{7}-1\frac{6}{7}=6\frac{1}{7}\\\\f)\ \ 12-5\frac{7}{13}=11\frac{13}{13}-5\frac{7}{13}=6\frac{6}{13}\\\\g)\ \ 5-2\frac{3}{5}=4\frac{5}{5}-2\frac{3}{5}=2\frac{2}{5}[/tex]
[tex]h)\ \ 9-5\frac{4}{7}=8\frac{7}{7}-5\frac{4}{7}=3\frac{3}{7}[/tex]
