Răspuns :
[tex] \frac{45}{28} + \frac{23}{89} = \frac{4005}{2492} + \frac{644}{2492} = \frac{4649}{2492} [/tex]
Sper ca e bine
45/28 + 23/89= aducem la acelasi numitor ...2492
4005/2492 + 644/2492=4649/2492
4005/2492 + 644/2492=4649/2492