一年级数学下册第1单元《认识图形(二)七巧板习题课件新人教版.ppt

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七巧板,1 认识图形(二),1.有趣的七巧板,填一填。,知识点 1,认识七巧板,(1)七巧板是由( )种图形组成的,其中有( )个三角形。 (2)七巧板中两个相同的图形是号和( )号,还有( )号和( )号。 (3)号和号可以拼成( )形、( )形和( )形。,3,5,正方,三角,平行四边,2.下面两个图形是由右边的七巧板组成的,在图中标出每块板的编号。,知识点 2,用七巧板拼组图形,略,3.用七巧板中的几块或全部拼一个平行四边形。(把拼成的图形画下来),易错点,略,辨析:用七巧板按要求拼图形时容易出错。,4.猜一猜,下面的图形像什么?,用七巧板拼图案,( ),( ),略,

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