Odpowiedź :
[tex]-4 + \frac{4}{9} = -3\frac{9}{9}+\frac{4}{9} = -3\frac{5}{9}\\\\\\-2-(-1\frac{2}{3}) = -1\frac{3}{3}+1\frac{2}{3} = -\frac{1}{3}[/tex]
[tex]-4 + \frac{4}{9} = -3\frac{9}{9}+\frac{4}{9} = -3\frac{5}{9}\\\\\\-2-(-1\frac{2}{3}) = -1\frac{3}{3}+1\frac{2}{3} = -\frac{1}{3}[/tex]