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

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加减混合,你能提出什么问题?,现在还有几只天鹅?,4 + 32 =,5,你是怎么算出的?,4 + 32 =,7,5,5,从左往右计算,与连加、连减一样!,2,5,5,?,?,7-3+1=,4,5,6+4-3=,10,7,5,-2,+1=,3,4,4,8,3,5,4,+,3,车上原来有6人, 现在有多少人?,下车5人 上车8人,比一比,看谁做得最好,2,3,5,2,5,2,5,6,5,再 见!,

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