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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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