Răspuns:
[tex]a = 1 - \frac{2}{5} \div \frac{4}{5} + 3 \div 1 \frac{1}{5} \\ a = 1 - \frac{2}{5} \times \frac{5}{4} + 3 \times \frac{5}{6} \\ a = 1 - \frac{1}{2} + \frac{5}{2} \\ a = 1 + \frac{ - 1 + 5}{2} \\ a = 1 + \frac{4}{2} \\ a = 1 + 2 \\ a = 3[/tex]
