Odpowiedź:
[tex]1)\ \ \frac{3}{8}+\frac{2}{3}=\frac{9}{24}+\frac{16}{24}=\frac{25}{24}=1\frac{1}{24}\\\\2)\ \ 1\frac{1}{4}+3\frac{5}{6}=1\frac{3}{12}+3\frac{10}{12}=4\frac{13}{12}=5\frac{1}{12}\\\\3)\ \ \frac{7}{9}-\frac{3}{4}=\frac{28}{36}-\frac{27}{36}=\frac{1}{36}\\\\4)\ \ 2\frac{3}{4}-1\frac{5}{8}=2\frac{6}{8}-1\frac{5}{8}=1\frac{1}{8}[/tex]
[tex]5)\ \ 7-\frac{5}{9}=6\frac{9}{9}-\frac{5}{9}=6\frac{4}{9}\\\\6)\ \ 3\frac{1}{7}-1\frac{3}{4}=3\frac{4}{28}-1\frac{21}{28}=2\frac{32}{28}-1\frac{21}{28}=1\frac{11}{28}[/tex]
