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多年来,笔者一直从事小学高年级数学的教学。近几年,发现部分毕业班的孩子在计算中存在以下问题:计算除法时忘记写商中间或末尾的0,分数计算时不能熟练地通分和约分,等等。这些问题严重制约着学生“双基”的达成,成为后续学习的绊脚石。恰逢这学期笔者执教苏教版《数学》四年级上册第二单元“三位数除以两位数的除法”。在教学过程中,我发现仍有不少孩子不会试商,整数乘法计算时失误较多,多位数退位减法不过关。此外,还存在非智力因素如看错数
Over the years, I have been engaged in teaching high school mathematics. In recent years, it has been found that some graduating children have the following problems in calculation: forgetting to write 0 in the middle or at the end of the division, failing to pass the points and dividing points when calculating scores, and so on. These problems seriously restrict the students “Double Base ” reached, as a stumbling block to follow-up study. Coincided with this semester I co-teach Sujiao Edition “Mathematics” fourth grade on the second unit “three-digit divided by two-digit division ”. In the teaching process, I found that there are still many children will not test, integer multiplication error calculation more, multi-digit abatement subtraction, but off. In addition, there are non-intelligence factors such as misreads