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异分母分数加减法
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同分母分数加减法
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同分母分数加减法（一）
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分数的整理与复习（二）
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分数的整理与复习一
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探索规律二
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分数与小数的互化
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通分的练习
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通分
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约分
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分数基本性质
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分数的意义练习
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真分数假分数带分数
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分数与除法的关系
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分数的意义
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因数倍数整理与复习（二）
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因数倍数整理与复习 一 佟志新
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最小公倍数
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最大公因数
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分解质因数
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