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一年级数学下册第4章100以内数的认识4.3整十数加一位数及相应的减法课件新人教版.ppt

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同学们，老师要给大家发写字本 了，你都看到了什么？根据你看 到的信息，你能提出什么问题？,30 2 230,32,32,一共有多少本呢？ 你打算怎么解决？,302等于多少呢？ 你是怎样计算的？,32 2 ,30,32 30 ,2,1.,先摆5捆，再摆6根，然后 列出相应的算式。,2.烤玉米。,这节课你有什么收获？,整十数加一位数，就是把整十数和一位数合起来；,几十几减一位数，就是在这几十几里去掉一位数。,作业,请完成教材第49页练习十一 第二题、第三题、第五题。,xx小学 x年级x班,xxx,

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