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当前位置:首页 > 临时分类 > 七年级数学下册 第一章《整式的运算》单元综合测试5 北师大版
第一章整式及其运算一、选择题:(每题3分,共36分)1.下列计算正确的是()347.235Axxx3331243.xxxB336.235Cxxx325.428Dxxx2.下列多项式乘法,能用平方差公式计算的是())23)(23(xxA))((abbaB(32)(23)Cxx)32)(23(xxD3.下列各式正确的是()222)(babaA2(6)(6)6Bxxx22)()(xyyxC42)2(22xxxD4.下列计算正确的是()1052.(10)(5)2Aaaa2321.nnnBxxx2()()Cabbaab43331.(5)(10)2Dabcabac)45)(45.(52222yxyx运算的结果是()441625.yxA4224164025.yyxxB44.2516Cxy4224164025.yyxxD6.下列计算正确的是();:4)2(:6)3(;872222221055yyybabaqppqxxx④③②①6322242:();bbbpqpq⑤⑥A.①②④B.②③⑤C.③④D.④⑥7.运算结果是42221baab的是()22.(1)Aab22)1.(abB222.(1)Cab222.)1.(baD8.若)1)(2(xax中不含x的一次项,则()1.aA1.aB.2Ca2.aD9.若,2,32xxba则232)()(xxba的值为()A.0B.1C.3D.510.长方形一边长为,2ba另一边比它小ab则长方形面积为()222.babaAabaB22.2244.babaC22.252Daabb11.下列多项式的积,计算结果为3372234xxxx的是())3)(12)(1(2xxxA)1)(12)(3(2xxxB2(1)(21)(3)Cxxx)3)(1)(12(2xxxD12.若2449xmx是一个完全平方式,则聊的值为().14.14.28.28ABCD二、填空题:(每空2分,共46分)23.132yx的系数是,次数是.14.若2512mxy与122nxy是同类项,则_______mn23522315()()()_______;()()()_____bbbxxx23232316.(2)_____.(2)(4)_____xyabab2217(2)(2)______;(35)(_______)259.ababxyyx221218(2)______,()_______.43xyab19.计算:4026911162()()_______(710)(410)________33220082009120.200920082010_______;(3)()_______32221(32)(32)(94)________(1)(1)________.abababmnmn22.已知:3m2,5,_________mnnaaa则23.若,2632xx则2266_______.xx24.若,0323yx则84_______.xy25.若,51xx则21()________xx26.已知:,0136422yxyx则_______xy27.若x,y为正整数,且,3222yx则x,y的值共有对.三、解答题:(共68分)28.计算:(每小题4分,共40分);)()1(33aaas23235223(2)2()2.(2)xxxxxx(3)(2)(3);aa);12(6)2)(4(23xxxx2(5)()(2)(2);xyxx)3)(3()23)(32)(6(xyyxxyyx2)2(2)4)(2)(7(yxyxyx.)2()4824)(8(2223223xyyxyxyx2211(9)(2)(2)22xyxy2111(10)(3)(9)(3)242aaa29.先化简,再求值:(每小题5分,共10分)2(1)(2)(21)5(1)(1)3(1)mmmmm其中.1m),21(:)](2)())[(2(222yyxyyxyx其中.1,21yx30.(5分)解方程:.)2(3223)1)(1(2xxxxx31.(8分)若,2,52xyyx求下列各式的值:.)2)(2(;4)1(222yxyx32.(5分)菜单位为响应政府发出的全民健身的号召,打算在长宽分别为20米和11米的长方形大厅内修建一长方形健身房ABCD,该健身房的四面墙壁中有两侧沿用大厅的旧墙壁(如图为平面示意图),已知装修旧墙壁的费用为口元,平方米,比新建(含装修)墙壁的费用每平方米少50元,设健身房的高为3米,一面旧墙壁AB的长为x米,BC为)5(x米,则修建健身房墙壁的总投入为多少元?(用含口、x的代数式表示)参考答案一、DBCDBDACBDCD二、13.32,314.515.10b,7x16.3648,2xya17.224,53abyx18.222211444,1639xxyyaabb19.168,2.81020.12008,321.44228116,21abnmm22.4023.1424.825.2926.略27.4三、28.(1)835aaa(2)6282688882().282284xxxxxxxxx(3)222366aaaaa(4)333233228(6126)861262126xxxxxxxxxxx(5)22222424xxyyxxyy(6)222222943391278yxxyxyxyyxxy(7)222222828836xxyyxxyyxxy(8)32232222(2484)(4)621xyxyxyxyxy(9)=2222224224111[(2)()](4)1622416xyxyxxyy(10)=22224211191(9)(9)(9)81444216aaaaa29.(1)2222325(1)3(21)96;1mmmmmmm当时;原式=-3(2)=211(42)()84;22xyyyxy当x=,y=-1时;原式=-830.22222232144236692462424669224424613x=26x=2xxxxxxxxxxxxxxx31.22222222(1)(2)444()425,2425817xyxxyyxxyxyxyxyxyxy222222(2)(2)44417,2(2)1789xyxxyyxyxyxy且32.[3(5)3][3(5)3](50)12303007503(25)(250)()xxaxxaaxaxxa元
本文标题:七年级数学下册 第一章《整式的运算》单元综合测试5 北师大版
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