学目标
1.初步认识长方形正方形周长面积关系
2.知道长方形周长相等情况长宽越接面积越
3.培养学学数学兴趣
学重难点
1.长方形周长面积关系
2.正方形周长面积关系
学程
复
1.说说长方形正方形周长面积计算方法
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2.长方形正方形周长面积什区?
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二学容
1.兔宝宝白灰长兔妈妈负责花坛着两花坛白说:两花坛周长相等两花坛样灰说:两花坛样周长面积没关系认话?什?
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2.操作完成实验报告:16根棒摆出长方形求出周长面积(根棒代表1米)
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三练
1.判断:长方形正方形周长相等面积相等?果两长方形面积相等周长定相等?
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2.20厘米长铁丝围成种长方形?中图形面积?
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3.两块长方形菜甲长18米宽9米乙长20米宽7米果计算否直接判断块菜?
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四课堂总结
天学什容?长方形正方形周长面积间什联系?
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五课作业
张长方形纸剪成两完全样长方形样剪长方形周长?果长方形周长应该样剪?
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