以下是关于【二十以内进位加法】的公开课/优质课视频，一共96个
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28:4485《4 两位数乘两位数-笔算乘法（不进位）》人教2011课标版小学数学三下教学视频-贵州黔西南布依族苗族自治州_兴仁县-黄应丽
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42:229《4 两位数乘两位数-笔算乘法（进位）》人教2011课标版小学数学三下教学视频-贵州安顺市_镇宁布依族苗族自治县-陈明栗
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