同时对照学习优秀儿童的问题表征，探索学习障碍儿童数学问题解决的表征特点和类型。
We also seek after the characteristics and types of the representations of mathematical problem-solving of children with learning disability by contrast that of excellent children.
阐述了问题表征在数学问题解决中的作用；
The study expatiates the role of the mathematics problem representation in problem-solving;
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