2021年八年级数学分式同步练习.pdf
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1、精品好资料欢迎下载分 式 单 元 测 试姓名_ _ _得分_ _ 一、择题（每小题 2 分，共 16分）1、在式子a1，xy2，4332cbax65，87yx，yx109中，分式的个数是（）A 2 B 3 C 4 D 5 2、能使分式122xxx的值为 0 的所有x的值是（）A 0 x B 1x C 10 xx或 D 10 xx或3、如果把分式yxx10中的yx,都扩大 10 倍，则分式的值（）A 扩大 100倍 B 扩大 10倍 C 不变 D 缩小到原来的1014、如果方程xxx21321有增根，那么增根是()A、2x B、2x C、1x D、3x5、某项工程甲乙合作n天完成，甲单独做需要m
2、天完成（mn）那么乙单独完成的时间是（）A )(mn天 B mn111天 C mn1天 Dmn111天二、填空题(每空 2 分，共 24 分)1、当x_时，分式1)1(2xx有意义；当 _时，分式1)1(2xx的值为 0。2、约分：._1,._)1(12bababmabm|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 6 页精品好资料欢迎下载3、,(_)(3)(6.,._)(2zyzyzyxabyaxy4、不改变分式的值，将yxyx2.01.02.05.0分子分母中各项系数都转化为整数，结果为 _.5、不改变分式的值，将32211mm
3、mm分子分母中最高次项的系数都转化为正数，结果为 _.6、关于的 x 分式方程211xxxa有增根，则 a 等于_ 三、解答题（本大题共36 分）1、计算（每小题 4 分，共 16 分）（1）、bba1（2）、2xxyyxyx|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 6 页文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB
4、6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6
5、C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U
6、4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:
7、CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 H
8、T6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH
9、5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编
10、码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2精品好资料欢迎下载（3）、xxx2224（4）、224442xxxxx2、化简并求值（每小题5 分，共 10 分）（1）22121222xxxxxx，其中x的值选一个你喜欢的值代入。|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 6 页文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5
11、U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码
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17、 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2精品好资料欢迎下载3、解关于x分式方程（每小题5 分，共 10 分）（1）32168xx (2)311223xx|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 6 页文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5S6H2I7 HT6C2U4T3V2 ZH5U4L10V1G2文档编码:CB6C5
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