二年级数学下册六《认识图形》长方形与正方形同步练习1北师大版.doc

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1长方形与正方形 一、比较长方形与正方形。长方形的对边( ) ,四个角都是( )角。正方形的四条边( ) ,四个角都是( )角。二、说一说,下面几号图形是长方形,几号图形是正方形。三、在方格纸上画一个长方形和一个正方形。四、数一数图中正方形有几个?( )个 ( )个2( )个 ( )个五、填空1、长方形和正方形都是 边形。正方形是特殊的 形。2、拼成一个正方形,至少要用 根小棒;拼成一个长方形至少要用 根同样的小棒。3、至少要用 个完全一样的小正方形才能拼成一个大正方形。参考答案:一、比较长方形与正方形。长方形的对边( 相等 ) ,四个角都是( 直 )角。正方形的四条边( 相等 ) ,四个角都是( 直 )角。二、说一说,下面几号图形是长方形,几号图形是正方形。1 和 2 号是长方形,2 号是正方形三、略四、数一数图中正方形有几个?( 2 )个 ( 5 )个3( 8 )个 ( 11 )个五、填空1、长方形和正方形都是 四 边形。正方形是特殊的 长方形 形。2、拼成一个正方形,至少要用 4 根小棒;拼成一个长方形至少要用 4 根同样的小棒。3、至少要用 4 个完全一样的小正方形才能拼成一个大正方形。

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