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1、三年级数学竞赛题Fillintheblanks・(atotalof20points,2pointsforeachitem)1.atwodigitnumber,thesumofitsdigitsisexactly9,andthedigitis8timesthenumberofthetendigit,andthetwodigitis().2.,asevenstoreybuilding,eachstaircasehas16levels,Xiaodingfromthe1floortothe7floor,atotalwalk()l
2、eve1.3.thenumberoftwoand91,Lindainthecopythetitle,whichwillbeanumberofonabitlost,andthecalculatedresultsis37,thetwonumbersare()and()・4.findtherulesandfillinthenumbers・2,8,5,20,7,,2&11,44,(12).5.inFigure1,thenumberrepresentedbyBis()・6.followthedirectionsshowninFig
3、ure2,fromMtoN.7.thereis()asquareinfigure3.8.putP7andsevennumbersintothespacesbelow,andmaketheequationequa1.(eachnumbercanonlybeusedonce)X=83019二+.9.arectangularpasturesfencedintothreefaces,fourthedgesona100meterlongwall,includingthewallatthejunctionwithevery12met
4、ershaveastake,soa60meterslong36meterswiderectangularranchrequiresaminimumstake(root)・3.,theteacheratworkbycar,gohomeonfoot,ontheroadtakes90minutes;round-tripbusride,only30minutes・Ittakes()minutestowalkbackandforth・Two,judgment・(rightinbracketspainting〃V〃，thewrong
5、painting〃*〃・Atotalof10points,2pointsperquestion)4.tworectanglesareequalinarea,andtheircircumferenceisequa1.()5.11ofanumberisdoubly115,equalto16timesthenumber,andthisnumberis32.()6.,ina200meterlongpathalongthesideofplanting101trees,anyway,therearealwaystwotrees,th
6、edistanceisnotmorethan2meters・()7.therearetwowere100cmwoodennailsintoa180cmlongpieceofwood,themiddlenailintheoverlappingpartis20cmlong.()8.cut3piecesoftofuandcutinto6piecesatmost・()Three,select・Fillinthebracketswiththecorrectanswers・Atotalof10points,2pointsperque
7、stion)9.sportsstudentsstandinarow,theteacherletthemby1,2,3,4,5cyclenumber,2isthelastreportnumber,thisrowofstudents(people)・A.26B.27C.28Thethicknessof17.500sheetsofwhitepaperis50millimeters,thenthethicknessofthesheetis750millimeters・A.250B.1250C.7500Eighteen(unit:
8、squarecentimeter)Theshadedareainthefigureis()squarecentimeter・A.40B.30C.20Theaverageweightof19.6boysis40kilograms,andtheaverageweightof4girlsis30kilograms・Thea
