Odpowiedź :
[tex]2 \frac{3}{5} + 1 \frac{1}{4} + 3 \frac{2}{5} =2 \frac{12}{20} + 1 \frac{5}{20} + 3 \frac{8}{20} = 6 \frac{25}{20} = 7 \frac{5}{20} = 7 \frac{1}{4} [/tex]
[tex]2 \frac{3}{5} + 1 \frac{1}{4} + 3 \frac{2}{5} =2 \frac{12}{20} + 1 \frac{5}{20} + 3 \frac{8}{20} = 6 \frac{25}{20} = 7 \frac{5}{20} = 7 \frac{1}{4} [/tex]