Odpowiedź:
2/9 + 7/9 = 1
3 5/7 + 2/7 = 4
2 8/13 + 2 5/13 = 5
[tex]\frac{2}{9}+\frac{7}{9}=1\\\\ 3\frac{5}{7} +\frac{2}{7}=4\\\\2\frac{8}{13}+2\frac{5}{13}=5[/tex]
