一年级数学上册第5单元6_10的认识和加减法《连加连减》同步课件新人教版.ppt

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610的认识和加减法,连加 连减,一、复习旧知,(一)口算,6,9,5,6,5,4,7,5,每组两题有什么关系?,一、复习旧知,(二)看图列式,你看到了什么?能提出一个问题吗?,一共有几只小鸡?,52,二、探究新知,你又看到了什么?能提出一个问题吗?,一共有几只小鸡?,521,一共有几只小鸡?,52,一共有几只小鸡?,521,二、探究新知,521,7,8,你们会计算这个算式吗?,二、探究新知,你又看到了什么?能提出一个问题吗?,还剩几只小鸡?,822,二、探究新知,你们会计算这个算式吗?,822,6,4,三、知识运用,(一)基本练习,23 54 234,5,5,9,5,9,93 64 934,6,6,2,6,2,三、知识运用,(二)做一做,1,8,5,2,先说一说图的意思, 再填一填。,四、布置作业,作业:第66页练习十四,第2题、第3题、第6题。,

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