2022年人教版数学八年级下册分式复习测试题 .pdf

分式复习测试题一、填空题（每小题3 分共 24 分）1已知x 2 时，分式xbxa无意义，x4 时，此分式的值为零，则ab_.2在22bab中，如果a，b都扩大 2 倍，则分式的值将_.3已知xy43，则分式3223xyxy的值为 _.4计算：3xy223yx_；015215_.5化简：（32a b）2（13a b）3_（将结果写成正整数指数幂的形式）.6若分式12x比32xx小 2，则x_.7观察下面一列数，按某种规律在横线上填上适当的数：13，35，57，79，911，,，则第n个数为 _.8南水北调东线工程已经开工，某施工单位准备对运河一段长2240m 的河堤进行加固，由于采用新的加固模式，现计划每天加固的长度比原计划增加了20m，因而完成河堤加固工程所需天数将比原计划缩短2 天，若设现在计划每天加固河堤xm，则得方程为_.二、选择题（每小题3 分共 30 分）9下列各式：3x；22yy；5；25xx，其中是分式的有（）A.1 个B.2 个C.3 个D.4 个10若分式211xx的值为 0，则（）A.x1B.x 1C.x 1D.x1 11不改变分式1253xyxy的值，把分式和分母中的各项系数都化为整数，结果应为（）A.235xyxyB.151535xyxyC.1530610 xyxyD.253xyxy12下列分式的运算中，其中结果正确的是（）A.1a1b2abB.2aa3aC.22abababD.2369aaa13a13下列各式中，计算正确的是（）326；231a b a bab；112 2；（3.14）01.A.0 个B.1 个C.2 个D.3 个14一种细胞的直径约为1.56106米，那么它的一百万倍相当于（）A.下班跳棋棋子的直径B.数学课本的高度C.初中学生小丽的身高D.五层楼房的高度15当 2x3y时，（xyyx）（1yx）的值是（）A.2B.2C.12D.1216已知关于x的方程3xx23mx有正数解，则（）A.m0 且m 3B.m 6 且m3C.m0D.m6 17甲、乙两个清洁队共同参与了城中垃圾场的清运工作，甲队单独工作2 天完成总量的三分之一，这时乙队加入，两队又共同工作了1 天，总量全部完成，那么乙队单独完成总量需要（）A.6 天B.4 天C.3 天D.2 天18如图所示是一个电路图，总电阻R10（），已知1R11R21R，若 R12R2，则R1、R2的值分别为（）A.30，15B.203，103C.15，30D.103，203三、解答题（共46 分）19计算：（共 12 分）（1）0921360.2531442；（2）231xx21x；（3）22a b（333a b）645a b；（4）（1244a）2aa；20（8 分）解方程：（1）3xx233x；（2）21xx211x2；R1 R2 文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D10文档编码:CO6L5M7V5E8 HM5V7F10M10X3 ZC1L6E8A9D1021（6 分）请你先将式子2200911211aaaa化简，然后从 1，0，1 中选择一个数作为a的值代入其中求值22（6 分）当a为何值时，关于x的方程12xx235aa的解等于0？23（6 分）某制药厂承担了生产240 吨药品的任务，由甲、乙两个车间承担.甲车间单独生产这批药品比乙车间单独生产这批药品多用5 天，乙车间每天生产的药品量是甲车间的1.5倍.（1）你能找出这一情境中的一个等量关系吗？（2）根据这一情境你能提出哪些问题？（3）你能根据所提出的问题，列分式方程求解吗？24（8 分）某市从今年1 月 1 日起调整水价，每立方米水费上涨13.据了解，该市某学校去年 11 月份的水费是1800 元，而今年 3 月份的水费是3600 元.如果该校今年3 月份的用水量比去年 11 月份的用水量多6003m.（1）求该市今年的水价是多少？（2）学校开展了“节约每一滴水”的主题活动，采取了有效的节约用水措施，今年5 月份的用水量较3 月份降低20，那么该校今年5 月份应交的水费是多少？参考答案：122扩大 2 倍3 64292xy，1255351a b6072121nn（n1）.文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K38224020 x2240 x29B10B11C12D13C14C15C16B；提示：将分式方程化简得：x6m，由题意知030 xx，解得m 6 且m3.17D；18 A19 914；11x；62ba；2aa；20（1）方程两边同乘以（x3）得：x2（x3）3；解得x3，经检验x3 是原方程的增根，所以原方程无解；（2）方程两边同乘以（2x1）得 2x（x1）12（2x1），解得x12，经检验x12是原方程的解.21原式220091 1(1)1aaaa220091(1)aaaa20091a取a 1，原式20092（取另外两个数都将使原式失去意义）22把x0 代入12xx235aa得12235aa，解方程得a15.23答案不唯一，如：（1）乙车间每天生产的药品1.5甲车间每天生产的药品；（2）甲、乙车间单独生产这批药品各需多少天；（3）设乙车间单独生产这批药品需x天，由题意得240 x2405x1.5，解得x10 经检验x10 是所列方程的解.x510，所以甲车间单独生产这批药品需15 天，乙车间单独生产需10 天.24（1）设该市今年的水价为x元/3m，则去年的水价为34x元/3m.依题意可列方程3600 x180034x600.解得x2.经检验x 2 是原方程的解且符合题意，故该市今年的水价是2 元/3m；（2）236002（120）2880，该校今年5 月份应交的水费是2880 元.文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3文档编码:CO5H10C8Z1I6 HB7I2L10Y1A6 ZC9D1X6Y2K3