湖北省武汉市八年级数学下册第十六章二次根式16.2二次根式的乘除16.2.3二次根式的化简、乘除运算(习题课)导学提纲(无答案)(新版)新人教版.doc

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1、1二次根式的化简、乘除运算班级: 姓名: 小组: 评价: 【学习目标】1、能熟练进行二次根式的化简、运算【重点、难点】1.重点:能熟练进行二次根式的化简、运算2.难点:能利用二次根式隐含的条件进行化简、运算【自主思考】一、填空题1把下列各式化成最简二次根式:(1) _; (2) _;(3) _; (4) _;2x183548yxxy(5) _;6) _;(7) _; (8) _32424 3122在横线上填出一个最简单的因式,使得它与所给二次根式相乘的结果为有理式,如: 23与 .(1) 与_; (2) 与_;(3) 与_; 4) 与_3a323a3a3.化简二次根式:(1) _ (2) _

2、3) _62813144计算下列各式,使得结果的分母中不含有二次根式:(1) _ (2) _(3) _ (4)_ _51x232yx55已知 则 _; _(结果精确到 0001),73.17二、选择题6 成立的条件是( )x12A x1 且 x0 B x0 且 x1 C0 x1 D0 x17下列计算不正确的是( )A B C D47163xy6312201)5(412x32948把 化成最简二次根式为( )A B CD32321281241三、计算题9 计算: (1) (2) (3);3bab;321yxba10当 时,求 和 xy2 x2y 的值24,yx2yx拓广、探究、思考11观察规律: 并求值,321,231,21 (1) _ _; (2) _; (3)271 10_n12、化简:(1) (2)x22)(1x3)(

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