Odpowiedź :
[tex]2 \frac{9}{10} + 1 \frac{4}{15} = 2 \frac{27}{30} + 1 \frac{8}{30} = 3 \frac{35}{30} = 4 \frac{5}{30} = 4 \frac{1}{6} [/tex]
[tex]3 \frac{1}{8} + 1 \frac{1}{6} = 3 \frac{3}{24} + 1 \frac{4}{24} = 3 \frac{7}{24} [/tex]
[tex]2 \frac{9}{10} + 1 \frac{4}{15} = 2 \frac{27}{30} + 1 \frac{8}{30} = 3 \frac{35}{30} = 4 \frac{5}{30} = 4 \frac{1}{6} [/tex]
[tex]3 \frac{1}{8} + 1 \frac{1}{6} = 3 \frac{3}{24} + 1 \frac{4}{24} = 3 \frac{7}{24} [/tex]