以下是关于【排列与组合】的公开课/优质课视频，一共117个
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42:1913《8 数学广角——搭配（二）-稍复杂的排列问题》人教2011课标版小学数学三下教学视频-云南迪庆藏族自治州_香格里拉县-和学坤
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42:4893《8 数学广角——搭配（二）-稍复杂的排列问题》人教2011课标版小学数学三下教学视频-湖北恩施土家族苗族自治州_来凤县-田维