Răspuns:
[tex]4 \times \frac{1}{8} = 3\frac{8}{8} = \frac{32}{8} \times \frac{1}{8} = \frac{4}{8} {}^{(4} = \frac{1}{2} [/tex]
[tex]13 \times \frac{3}{65} =12 \frac{65}{65} = \frac{845}{65} \times\frac{3}{65} = \frac{39}{65} [/tex]
[tex]7 \times1 \frac{1}{4} = 6 \frac{4}{4} = \frac{28}{4} \times \frac{5}{4} = \frac{35}{4}[/tex]
