Computational Estimation Performance on Whole-Number Multiplication by Third- and Fifth-Grade Chinese Students

Fuchang Liu

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Computational Estimation Performance on Whole-Number Multiplication by Third- and Fifth-Grade Chinese Students

机译：中国三年级和五年级学生整数乘法的计算估计性能

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Four hundred and three 3rd- and 5th-grade Chinese students took the Multiplication Estimation Test or participated in the interview on it, designed to assess their computational estimation performance on whole-number multiplication. Students perform better when tasks are presented visually than orally. Third graders tend to use rounding based while fifth graders tend to use written algorithm based strategies, but boys' and girls 'performances do not differ. It is concluded that students often will not estimate simply at the request to estimate if an exact answer is within their mental computation capability, and a two-step process is suggested for helping students decide what route to take when given arithmetic problems.

机译：403名三年级和五年级的中国学生参加了乘法估计测验或参加了访谈，目的是评估他们对整数乘法的计算估计性能。视觉呈现的任务比口头表达的学生表现更好。三年级学生倾向于使用四舍五入，而五年级学生倾向于使用基于书面算法的策略，但是男孩和女孩的表现没有差异。结论是，学生通常不会简单地根据要求进行估算，以估算出准确答案是否在他们的智力计算能力之内，并且建议分两步进行的过程来帮助学生确定在遇到数学问题时应采取的路线。

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《School Science and Mathematics》 |2009年第6期|325-337|共13页
作者
Fuchang Liu;
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Wichita State University;

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正文语种 eng
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Computational Estimation Performance on Whole-Number Multiplication by Third- and Fifth-Grade Chinese Students

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