资源描述：
《(最全)2012年全国各地中考数学解析汇编2章整式的加减》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、（最新最全）2012年全国各地中考数学解析汇编2章整式的加减(latestandmostcomprehensive)2012mathematicalexaminationofallpartsofthecountrycompiledbytheexamination(accordingtochapter,testsitearrangement)Thesecondchapterofadaptivesubtraction2.1algebraicexpression1.(2012Zhejiang,Wenzhou,13,5),ifthealgebrai
2、cformulaiszero,thenIfthealgebraicformulaiszero,itcanbesolvedbysolvingthefractionalequation[answer]3[comment]ofthetestsolutionoffractionalequationfractionalequation.Solutionprocessis:throughtothedenominator,fractionalequationistransfonnedintointegralequations:thenthesolutio
3、noftheintegralequation;finallytest.Note:thetestismosteasilyignored.Thestudentsofmediumdifficulty.2.(2012,Zhejiang,Wenzhou,11,5points)simplification:[analysis]thedistributionlawandruletobracketswerearranged,andthemergerofsimilaritems・[answer_[comments]thereiserrorpronepoint
4、sdistributionlawwhenused,cannotusecompletely,appearleakagebyphenomenon,lessdifficulty・1.(2012Zhejiang,WenzhouProvince,15,5points)aschoolartclass,everyonecanplaythepianoorguzheng,ofwhichthenumberofpianoplayingwillbemorethanthenumberofpeopleplayingguzheng,10people,twowillhav
5、e7people.Letthepeoplecanplaythezither,theclassatotalofpeople(representedbyalgebraicformulacontaining)[Abstract]theproblemcanbefoundbydrawingthequantityrelationamongthem,andthenfindoutthequantityrelationandlistthealgebraicformula[answer][comment]thisquestionexaminesthequest
6、ionofalgebraicform,whichcontainstheideaofset2.(2012,Anhui,5,4points)anenterpriseinMarchthisyearoutputvalueof10000yuan,inAprilthaninMarchdecreasedby10%,inMaythaninAprilincreasedby15%,whileinMaytheoutputvalueis()A.(-10%)(+15%)10000yuanB.(1-10%)(1+15%)10000yuanC.(-10%+15%)100
7、00yuanD.(1TO%+15%)10000yuan[analysis]accordingtothe10decreasedinAprilthaninMarch,inApriltheoutputvalueisavailable(110)a,Mayprocure15%increaseoverApril,Mayoutputisavailable(110)(1+15)a,[answer]A.[comment]thekeytothiskindoftopicistofindoutwhois"benchmark"andregardthe"benchma
8、rk"as"unit1".Onthisbasis,increaseordecreasecanbeindicatedbythisbenchmarkquantity1.(2012Ji
