一年级数学上册第3单元1_5的认识和加减法《分与合》创新练习新人教版.doc

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1分与合 一、数一数,这些图是由几个正方体搭成的,请你搭一搭。( )个 ( )个 ( )个二、 3 3 / / 1 2 4 4 4 / / / 3 1 2 5 5 5 5 / / / / 4 1 1 4 2 3 3 2 三、找规律/ 3 2 1 / 4 3 2 1 4 5 1 2 3 1 2 3 4 小组交流,汇报 发现的规律。参考答案:一、数一数,这些图是由几个正方体搭成的,请你搭一搭。2( 8)个 (4 )个 (5 )个二、 2 1 2 1 3三、找规律两个数相加,其中一个加数减几,另一个加数加几,和一样。

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