Question

calculati : 5 pe 2 - 5 pe 9

Answer 1

5/2-5/9=5*9/18-5*2/18=45/18-10/18=35/18

Answer 2

$\frac{5}{2} - \frac{5}{9} =$ (ampificam prima fractie cu 9 si a doua cu 2)
$\frac{45-10}{18} = \frac{35}{18}$