Odpowiedź:
[tex]8\frac{2}{5}+3\frac{6}{5}=11\frac{8}{5}=12\frac{3}{5}\\\\12\frac{4}{8}+3\frac{7}{3}=12\frac{1}{2}+3+2\frac{1}{3}=12\frac{1}{2}+5\frac{1}{3}=12\frac{3}{6}+5\frac{2}{6}=17\frac{5}{6}\\\\13\frac{3}{4}-11\frac{1}{4}=2\frac{2}{4}=2\frac{1}{2}\\\\10\frac{2}{6}-9\frac{3}{6}=9\frac{8}{6}-9\frac{3}{6}=\frac{5}{6}\\\\7\frac{4}{9}-3\frac{3}{2}=7\frac{4}{9}-4\frac{1}{2}=7\frac{8}{18}-4\frac{9}{18}=6\frac{26}{18}-4\frac{9}{18}=2\frac{17}{18}[/tex]
[tex]3\frac{4}{5}-2\frac{2}{15}=3\frac{12}{15}-2\frac{2}{15}=1\frac{10}{15}=1\frac{2}{3}[/tex]
