Odpowiedź :
[tex]-1\frac{1}{5}+(-2\frac{3}{4})=-1\frac{4}{20}-2\frac{15}{20}=-3\frac{19}{20}\\-1,6-(3,4)=-1,6-3,4=-5\\-3\frac{2}{3}+1\frac{5}{4}=-3\frac{8}{12}+2\frac{3}{12}=-1\frac{5}{12}[/tex]
[tex]-1\frac{1}{5}+(-2\frac{3}{4})=-1\frac{4}{20}-2\frac{15}{20}=-3\frac{19}{20}\\-1,6-(3,4)=-1,6-3,4=-5\\-3\frac{2}{3}+1\frac{5}{4}=-3\frac{8}{12}+2\frac{3}{12}=-1\frac{5}{12}[/tex]