Although some research has dealt with part-whole, quotient and operator situations with young children, these were not conceived to establish systematic and controlled comparisons between the situations. There have been no comparisons between the three situations in research on childrens understanding of fractions. Research about the impact of each of these
situations on the learning of fractions is difficult to find. We still do not know much about the effects of each of these situations on childrens understanding of fractions. This paper provides such evidence.