Question

ex 3 punctul b va roog!​

Answer 1

$\frac{13}{5} - ( \frac{31}{10} - \frac{5}{2} + 1) = \\ = \frac{25}{10} - ( \frac{31}{10} - \frac{25}{10} + \frac{10}{10}) = \\ = \frac{25}{10 } - \frac{31 - 25 + 10}{10} = \frac{25}{10} - \frac{16}{10} = \frac{9}{10} = 0.9$