PracticeofSimpleAlgebraicEquations简易方程专项训练河南郑州市惠济区实验小学陈金金Lastweek,108studentstookpartinalong-distancerace.Amongthem,thenumberofboysis1.4timesthatofgirls.Howmanyboystookpartintherace?Howmanygirlstookpartintherace?Thetwocarssetoutatthesametimefromaplace280kilometersawayandwentinoppositedirections.After4hours,thetwocarsmet.CarAtravelled30kilometersperhour.HowmanykilometersdidCarBtravelperhour?TomandJacksetoutfromtwotowns150kilometersapartbybikeatthesametimeandwentinoppositedirections.Tomtravelled16kilometersanhour.After4hours,TomandJackhaven’tmetandthedistancebetweenthemwas30kilometers.HowmanykilometersdidJacktravelperhour?Thedifferenceofsubtracting15from6timesofanumberisexactlythesumof4timesofthenumberplus5.Whatisthisnumber?Ateamofworkersarerepairingaroadof5600-meterlong,whichhasbeenrepairedfor12days,andthereisstill800metersofroadlefttoberepaired.Howmanymetersoftheroad40CrazyEnglish1.2.3.4.5.didtheworkersrepaironaverageeveryday?Howmanydayswillittakethemtofinishrepairingthisroadintotal?David’sgrandfatherplannedtousea400-meterfencetomakearectangularvegetablegarden.Ifthelengthofthevegetablegardenis80meterslongerthanitswidth,howmanymetersarethelengthandthewidthofthevegetablegarden?Agroupoftouristswillstayinahotel.If2touristslivein1room,36roomswillberequired;If3touristslivein1room,howmanyroomswilltheyneed?Nancypaid42yuanfortwokindsofstamps.Oneis2yuaneachstamp,andtheotheris8jiaoeachstamp.Thenumbersofthetwokindsofstampsarethesame.Howmany2yuanstampsand8jiaostampsdidNancybuy?Theperimeterofarectangleis64cm,andthelengthis3cmmorethanitswidth.Howmanycentimetresisthelengthandhowmanycentimetresisthewidthoftherectangle?(参考答案见本期第54页)416.7.8.9.10.Thereare32black6-sidedpolygonsandwhite6-sidedpolygonsonthesurfaceofafootballintotal.3sidesofeachwhitepolygonareconnectedwithblackpolygons.6sidesofeachblackpolygonareconnectedwithwhitepolygons.Howmanywhitepolygonsarethereonthesurfaceofafootball?enameln.牙釉质gumn.牙龈absolutelyadv.绝对地cattlen.（牛的总称）...
