(福建专版)2019春八年级数学下册第十六章二次根式16.3二次根式的加减第1课时二次根式的加减课件(新版)新人教版.pptx

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16.3 二次根式的加减,第1课时 二次根式的加减,1.一般地,二次根式加减时,可以先将二次根式化成 ,再将 的二次根式进行合并. 2.下列计算正确的是( ).,最简二次根式,被开方数相同,D,二次根式的加减运算,分析:根据二次根式的乘除运算法则或性质先把式中各项进行化简,再把被开方数相同的二次根式进行合并.,1.下列计算正确的是( ).,答案,答案,A.23之间 B.34之间 C.67之间 D.78之间,答案,答案,解析,答案,答案,

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