Răspuns:
1.
[tex]2 \frac{5}{3 } = \frac{2 \times 5 + 3}{5} = \frac{13}{5} [/tex]
2.
[tex] - 5 \frac{2}{7} = \frac{ - 5 \times 7 + 2}{7} = - \frac{33}{7} [/tex]
3.
[tex] - 1 \frac{7}{9} = \frac{ - 1 \times 9 + 7}{9} = - \frac{16}{9} [/tex]
4.
[tex]13 \frac{5}{4} = \frac{13 \times 4+5}{4} = \frac{57}{4} [/tex]
5.
[tex]21 \frac{5}{6} = \frac{21 \times 6 + 5}{6} = \frac{131}{6} [/tex]
