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

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610的认识和加减法,加减混合,一、复习旧知,1. 口算,340,433,513,1037,952,706,一、复习旧知,怎样计算连加连减?,按从左到右的顺序来计算。,2. 想一想,二、探究新知,432,7,5,二、探究新知,423,2,5,从图中你知道了什么? 你能提出一个问题吗?,三、知识运用,(一)基本练习,池塘里原来有6只小鸭,来了3只,又走了4只,现在池塘里有几只小鸭?,634,9,5,三、知识运用,(二)解决问题,四、布置作业,作业:第68页练习十五,第2题第4题。,

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