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一年级数学下册第4单元100以内数的认识第10课时练习课课件新人教版.ppt

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第 10 课时 练 习 课,78,70,8,44,40,75,5,70,93,3,90,4,方法一：50+3=53，5355,够 方法二：55-50=5，53,够,每人一瓶矿泉水，55瓶够吗？,有50个学生，3个老师。,2.,4.,50,72,60,26,95,70,9,8,30,76,4,80,56分,56-50=6（分）,5,1,2,9,

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