Odpowiedź :
Odpowiedź:
[tex]2\frac{3}{18}-1\frac{8}{18}=1\frac{21}{18}-1\frac{8}{18}=\frac{13}{18}\\\\6\frac{12}{20}-3\frac{19}{20}=5\frac{32}{20}-3\frac{19}{20}=2\frac{13}{20}\\\\2\frac{5}{7}-1\frac{6}{7}=1\frac{12}{7}-1\frac{6}{7}=\frac{6}{7}[/tex]