一年级数学下册第2单元《观察物体》《看一看(二)》授课课件(新版)北师大版.ppt

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看一看(二),课后作业,探索新知,当堂检测,课堂小结,判断从不同方向观察到的物体的形状,题西林壁 横看成岭侧成峰 远近高低各不同 不识庐山真面目 只缘身在此山中,侧看,因为从不同的角度去观察庐山,所观察到的形状是不一样的。,同样是庐山,为什么会横看成岭侧成峰呢?,探究点 判断从不同方向观察到的物体的形状,从不同方向观察小汽车,说说你看到了什么。,小明,小华,小亮,他们分别看到的是下面的哪幅图?连一连。,从书包的背面看,会看到哪幅图?(画“”) 从书包的侧面看,会看到哪幅图?(画“”),1长颈鹿看到的是哪幅图?(画“”),2三个人分别看到的是哪幅图?连一连。,观察物体时,可以根据物体各个面的形状的特点,想象从哪个方向看这个物体才能显现出这种形状。,归纳总结:,夯实基础(教材P21练一练),3它们分别看到的是什么?连一连。,(1),(2),笑笑,淘气,笑笑,淘气,4看一看,说一说,下面哪幅图是淘气看到的?哪幅图是笑笑看到的?,5连一连,说一说。,6它们谁说得对?对的在 里画“ ”,错的画“”。,辨析:看图列式计算时不理解图的意思,作 业 1.从课后习题中选取; 2.完成练习册中本课时的习题。,

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