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希望之声

生命中最可贵的是懂得欣赏,而不是拥有。

 
 
 

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12.16数学  

2014-12-16 16:00:12|  分类: 默认分类 |  标签: |举报 |字号 订阅

  下载LOFTER 我的照片书  |

       昨天学习了整点时间的特点,分针和时针的位置以及和整时之间的关系。今天上课继续讲了时钟问题,先讲了几个半点时间,然后找出了半点时间的特点和分针、时针的位置关系,重点让孩子观察出,半点时间中时针的位置,例如:3时30分,应该在哪两个整时间之间?分针应该对着几?时针在哪个位置,为什么?还对比了3时30分,用电子表表示是3:30,其中3表示哪个针,30是哪个针?当然这里只是初步的了解。

       还让孩子上来分别说了几时30分时,分针和时针的位置。初步尝试分针转一圈,时针走了几个大格?现在是3时30分,分针转1圈是几时几分?转3圈呢?还提及了顺时针和逆时针的概念。

       从上课的回答情况来看,7班的掌握情况较好,8班有2/3的孩子掌握,还有几个孩子上课听讲状态不好,家长们可以回家问问看,就知道孩子们的掌握情况了。

自主练习:

1.复习今天所学的知识。

2.做相应的练习题。

3.继续练习20以内口算。

4.做一些单元类似的试卷,近期准备考试,内容是学过的所有知识。

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