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"liang wei shu cheng liang wei shu ( bu jin wei )" jiao xue pian duan
Pages: 40-41
Year: Issue:  6
Journal: XIAOXUE JIAOXUE

Abstract:  片段一:估算结果(学生根据主题图提出问题并列出算式23×12后)师:我们不会计算23×12,但我们可以先来估计一下23×12的结果大约等于多少.
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