when the little boy and girl run into the street, if you slow play it, shes holding half a loaf of bread. when she reaches out and pulls the boy away from the horse, shes carrying a full loaf.
Not to mention that he also tears the loaf in half to split with the monkey, and then split his half in two for the kids, but he still had a full half loaf.
Actually Aladdin breaks the bread in half and then gives his half to the kids, after taking a bite and contemplating it for a minute Abu then also gives his half to the kids.