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![北师大数学七下《1.5平方差公式的认识》[王老师]【市一等奖】优质课](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2Ffe1697440b4f2c07c55f4348d10b5a7d4eea7a19.jpg%40672w_378h_1c_%21web-search-common-cover)
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![北师大数学七下《1.5平方差公式的应用》[花老师]【市一等奖】优质课](//imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2Fb259f0147200865fad8ce8bf7db9c509f4726ba4.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：3 时间：2025-12-13简介： -
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播放：0 时间：2025-12-13简介： -
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![[公开课]5.2.1利用等式的基本性质解一元一次方程](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F63455db378b099beb0b25d3dd7ca7b7047f29448.jpg%40672w_378h_1c_%21web-search-common-cover)
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![北师大数学七下《1.5平方差公式的认识》[王老师]【市一等奖】优质课](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2Ffe1697440b4f2c07c55f4348d10b5a7d4eea7a19.jpg%40672w_378h_1c_%21web-search-common-cover)
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