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1、学习好资料欢迎下载八年级上册第五章二元一次方程组单元检测题一、填空题(24 分)1、已知 x+y=5,且 x-y=1,则 xy=_。2、已知5,3yx是方程 ax2y2 的一个解,那么 a 的值是3、已知 2x3y1,用含 x 的代数式表示 y,则 y 4、已知 ykxb 如果 x4 时,y15;x7 时,y24,则 k;b5、已知二元一次方程组45axbybxay的解是21xy,则 a+b的值为 _。6、若532yxba与xyba2425是同类项,则 x=,y=.7、如右图,已知函数yaxb和ykx的图象交于点 P,则根据图象可得,关于yaxbykx的二元一次方程组的解是 .8、一次函数 y
2、=x-1 与 y=2x-1的交点坐标是 .二、选择题(24 分)9、已知二元一次方程组225xyxy的解是()A.16xy B.14xy C.32xy D.32xy10、如右图,AB BC,ABD的度数比 DBC的度数的两倍少 15,设 ABD和DBC 的度数分别为 x、y,那么下面可以求出这两个角的度数的方程组是()A9015xyxy B90215xyxyC90152xyxyD290215xxy11、无论 m为何实数,直线 y=2x+m与 y=x+4的交点不可能在()A、第一象限 B、第二象限 C、第三象限 D、第四象限12、下列方程组的解中是二元一次方程组225xyxy的解是()A.16x
3、y B.14xy C.32xy D.32xy13、若2,1xy是下列某二元一次方程组的解,则这个方程组为()A、35,1xyxy B、3,25xyyx C、2,31xyxy D、25,1xyxy14、我校运动员分组训练,若每组7 人,余 3 人;若每组 8 人,则缺 5 人;设运动员人数为 x 人,组数为 y 组,则列方程组为()A D B C yx学校楚雄市新街初级中学姓名考号班级装订线学习好资料欢迎下载A、xyxy5837B、xyxy5837C、5837xyxyD、5837xyxy15、以方程组21yxyx的解为坐标的点(,)x y在平面直角坐标系中的位置是()A第一象限 B第二象限 C第
4、三象限 D第四象限16、某航空公司规定,旅客乘机所携带行李的质量x(kg)与其运费 y(元)由如图所示的一次函数图象确定,那么旅客可携带的免费行李的最大质量为()、20kg 、25kg 、28kg 、30kg 三、解答题(52 分)17、(8 分)用指定的方法解下列方程组:(1)524yxyx(代入法)(2).2354,42yxyx(加减法)18、(6分)某校有两种类型的学生宿舍30 间,大的宿舍每间可住8 人,小的宿舍每间可住 5 人该校 198 个住宿生恰好住满这30 间宿舍大、小宿舍各有多少间?O3050300900 x(kg)y(元)文档编码:CZ9X1S5P7I4 HI10N4T7T
5、9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7
6、X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S
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8、7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9
9、N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X
10、1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N
11、4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4学习好资料欢迎下载19、(6分)在某校举办的足球比赛中规定:胜一场得3 分,平一场得 1 分,负一场得 0 分,某班足球队参加了12 场比赛,共得 22 分,已知这个队只输了2场,那么此队胜几场?平几场?20、(8分)甲、乙两相距36 千米两地相向而行,如果甲比乙先走2 时,那么他们在乙出发 2.5 时后相遇;如果
12、乙比甲先走2 时,那么他们在甲出发3 时后相遇,甲、乙两人每时各走多少千米?21、(8 分)用作图象的方法解方程组.52,02yxyx文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H
13、5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4
14、文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P
15、7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T
16、9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7
17、X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S
18、5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4学习好资料欢迎下载22、(8 分)某山区有23 名中、小学生因贫困失学需要捐助,资助一名中学生的学习费用需要a 元,一名小学生的学
19、习费用需要b 元,某校学生积极捐款,初中各年级学生捐款数额与用其恰好捐助贫困中学生和小学生人数的部分情况如下表:初一年级初二年级初三年级捐款数额(元)4000 4200 7400 捐助贫困学生(名)2 3 捐助贫困小学生人数(名)4 3(1)求 a、b 的值;(2)初三年级学生的捐款解决了其余贫困中小学生的学习费用,请将初三年级学生可捐助的贫困中、小学生人数直接填入上表中。(不需写出计算过程)23、(8 分)某景点的门票价格规定如下表购票人数150 人51100人100人以上每人门票价12 元10元8 元某校八年(一)、(二)两班共 102人去游览该景点,其中(一)班不足50 人,(二)班多于
20、 50 人,如果两班都 以班为单位分别购票,则一共付款1118 元.(1)两班各有多少名学生?(2)如果你是学校负责人,你将如何购票?你的购票方法可节省多少钱?文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I
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26、X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4学习好资料欢迎下载文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档
27、编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I
28、4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H
29、5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4
30、文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P
31、7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T
32、9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4文档编码:CZ9X1S5P7I4 HI10N4T7T9H5 ZH1Q5Z9N7X4