Question

a=2,5 b= minus 12 supra 10 , calculati a ori b

Answer 1

$a = 2.5 = \frac{25}{10}$

$b = - \frac{ 12}{10} = - \frac{6}{5}$

$\frac{25}{10} \times - \frac{6}{5} = \frac{15}{5} = 3$
Succes!