山东省德州市2019年中考数学同步复习重点题型训练要题加练1分式的运算.doc

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1、1要题加练 1 分式的运算姓名:_ 班级:_ 用时:_分钟1(2018台州中考)计算 ,结果正确的是( )x 1x 1xA1 BxC. D.1x x 2x2(2018江西中考)计算(a) 2 的结果为( )ba2Ab BbCab D.ba3(2018苏州中考)计算(1 ) 的结果是( )1x x2 2x 1xAx1 B.1x 1C. D.xx 1 x 1x4(2018衡阳中考)计算: _x2x 1 1x 15(2018永州中考)化简:(1 ) _1x 1 x2 xx2 2x 16(2018白银中考)计算: ( 1)ba2 b2 aa b7(2018黔南州中考改编)化简:(1 ) .2x 1 x

2、2 xx2 6x 98(2018泰州中考)化简:(2 ) .x 1x 1 x2 6x 9x2 19(2018十堰中考)化简: .1a 1 1a2 a a2 1a2 2a 1参考答案21A 2.A 3.B 4.x1 5.x 1x 16解:原式 ( 1)b( a b) ( a b) aa b b( a b) ( a b) a a ba b .b( a b) ( a b) a bb 1a b7解:原式 x 3x 1 x( x 1)( x 3) 2 .xx 38解:原式( )2x 2x 1 x 1x 1 ( x 3) 2( x 1) ( x 1) x 3x 1 ( x 1) ( x 1)( x 3) 2 .x 1x 39解:原式 1a 1 1a( a 1) ( a 1) 2( a 1) ( a 1) 1a 1 1a( a 1)a 1a( a 1) .1a

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