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比的化简比的认识课堂导入-新知探究-课堂练习-课堂小结-课堂作业PPT模板：www.1ppt.com/moban/PPT素材：www.1ppt.com/sucai/PPT背景：www.1ppt.com/beijing/PPT图表：www.1ppt.com/tubiao/PPT下载：www.1ppt.com/xiazai/PPT教程：www.1ppt.com/powerpoint/资料下载：www.1ppt.com/ziliao/个人简历：www.1ppt.com/jianli/试卷下载：www.1ppt.com/shiti/教案下载：www.1ppt.com/jiaoan/手抄报：www.1ppt.com/shouchaobao/PPT课件...
测量课桌有多长课堂导入-新知探究-课堂练习-课堂小结-课堂作业1、经历用不同工具测量同一物体长的过程，体会统一长度单位的必要性。2、认识“厘米”的实际意义，会用刻度尺中的厘米作单位测量物体的长度。3、能估计较小物体的长度，培养学生初步观察、操作的能力及估测的意识。【重点】认识长度单位“厘米”。【难点】能正确地用直尺测量物体的长度。看！我们教室的课桌摆得多整齐呀。想不想知道这些课桌的长度？一样的课桌？为...
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