Abstract: Designing a special math test proved that different problems contexts make effect to using the multiplicative concepts.The result came from primary student (including Grade 4 and Grade 6) from a primary school in Guangdond province.It indicated: (1) all the children (including the Grade 4 who have never learned Commutativity) can use the commutative cue successfully, irrespective of the context of the problem.(2) There was evidence that the problem context affected children's ability to use distributivity.The Grade 6 can used distributivity with Isomorphism of measures more successfully than other contexts.The all children in lower mark use distributivity with Isomorphism of measures more successfully than other contexts.In all, children can use multiplicative concepts to solve problem more successfully in Isomorphism context.

Key words: problem context, multiplicative concepts, primary student