2019年春八年级数学下册第十六章二次根式第4课时二次根式的乘除(2)—除法(课时小测本)课件(新版)新人教版.ppt

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第十六章 二次根式,第4课时 二次根式的乘除(2)除法,课前学习任务单,(a0,b0),乘这个数的倒数,课前学习任务单,课前学习任务单,=,课前学习任务单,=,课前学习任务单,课前学习任务单,略.,课堂小测,非线性循环练 1. (10分) 化简40的结果是 ( ) A. B. C. D. 2. (10分) 若二次根式 有意义,则x的取值范围是 ( ) A.x B.x C.x D.x,D,B,3. (10分) 计算或化简: (1) =_; (2) =_. 4. (10分) 一个三角形的两条直角边分别是 和 ,则这个三角形的面积是_. 5. (10分) 若x= ,y= ,求xy的值.,4,6,当堂高效测 1. (10分) 计算 的结果是 ( ) A.1 B. C. D.以上答案都不对 2. (10分) 已知a= ,b= ,用含a,b的代数式表示 ,这个代数式是 ( ) A.a+b B.a-b C.2a D.,B,D,3. (10分)计算: (1) =_; (2) =_(a0). 4. (10分) 化简: (1) =_; (2) =_(a0,b0).,5. (10分) 计算: .,

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