思变思创思发展——教学中素材选取与整合

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<正>缘起浙教版七年级上2.3有理数的乘法(1)这一课在两个班的不同演绎带来的不同效果让笔者备受启发.下面把两个班在进行有理数乘法中异号两数相乘及同负两数相乘的法则教学中的片段作一回顾.
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