Odpowiedź :
Obliczenia
[tex]1\frac{1}{2}+2\frac{2}{5}=1\frac{1\cdot5}{2\cdot5}+2\frac{2\cdot2}{5\cdot2}=1\frac{5}{10}+2\frac{4}{10}=3\frac{9}{10}\\\\\huge\boxed{\text{Odp}. \ \text{B}}[/tex]
Obliczenia
[tex]1\frac{1}{2}+2\frac{2}{5}=1\frac{1\cdot5}{2\cdot5}+2\frac{2\cdot2}{5\cdot2}=1\frac{5}{10}+2\frac{4}{10}=3\frac{9}{10}\\\\\huge\boxed{\text{Odp}. \ \text{B}}[/tex]