一年级数学上册第3单元1_5的认识和加减法《分与合》教学课件新人教版.ppt

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分与合,把,放到两个筐里,有几种情况?,4,1,3,4,2,2,4,3,1,涂一涂,填一填。,1,3,2,2,3,1,1,4,2,3,5个,放在两个,里,,有几种放法?,3,2,4,1,你知道几和几合成5吗?,摆一摆,说一说。,5,3,1,4,5,2,5,3,1,4,2,5,5还可以分成,5可以分成1和4,1和4组成5。,涂一涂,填一填。,1,4,2,3,3,2,4,1,1,1,2,摆一摆,填一填。,2,2,1,3,1,3,按照下面排列的样子,接着画下去。,

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