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科学计数法 近似数 有效数字
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有理数的乘法
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有理数的加减法
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有理数-绝对值
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有理数的分类 数轴 相反数
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数据的收集与表示小结与复习
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中位数
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众数
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用科学计算器求平均数
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平均数
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用计算机绘制统计图
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数据的表示-3
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数据的表示-2
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数据的表示-1
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数据的收集与整理
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总体与样本
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因式分解小结与复习
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运用公式法-3
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公式法-2
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运用公式法-1
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