<![CDATA[Proportion is one of the main topics in mathematics have been learnt in primary school. This is a qualitative study aims at understanding how primary studentswith different mathematics ability work on proportion problem. The subjects are grade 5 studentsconsisted of low, middle, and high level mathematics ability.The instrument is a proportion problem test. The result shows that students with low ability did not use idea of proportion attacking the problem. The students looked the quantities directly. Middle levels used the proportionconcepthowever they couldn’t consider all of information in the problem. Thus, they couldn’t draw a good statement in order to make a reasonable conclusion. Highlevel students used proportion and considered all of the quantities to draw the conclusion]]>
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