[tex]2.(4) = \frac{24 - 2}{9} = \frac{22}{9} \\ \\ 3.1(2) = \frac{312 - 31}{90} = \frac{281}{90} \\ \\ \frac{22}{9} + \frac{281}{90} = \frac{220}{90} + \frac{281}{90} = \frac{501}{90} \\ \\ \\ 0.(25) = \frac{25}{99} \\ \\ 3.4(5) = \frac{345 - 34}{90} = \frac{311}{90} \\ \\ \frac{25}{99} + \frac{311}{90} = \frac{250}{990} + \frac{3421}{990} = \frac{3671}{990} [/tex]
Sper ca e bine
