Teaching Difficult Points: Conclude the ways of statistics.
教学难点：归纳数据整理的方法。
Teaching Difficult Points: Find the proper relationship among the Numbers according to the condition provided.
教学难点：根据应用题的数量关系找出等量关系。
Teaching Difficult Points: Find the proper relationship among the Numbers according to the condition provided.
教学难点：根据应用题的数量关系找出等量关系。
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