美国“数学大联盟杯赛”一、二年级竞赛例题1.2+0+1+0=2+1+?A)3B)2C)1D)02.Iwas5old4ago.HowoldwillIbe3fromnow?A)8B)9C)12D)133.Thereare3dinosaureggsinanest.Howmanyeggsisthat?A)15B)36C)42D)724.Theof7and123isA)116B)130C)741D)8615.Ofthefollowing,isnotanumber?A)3+2B)3−2C)3×2D)3÷26.Whichistwolessthanonemorethantenthousand?A)10002B)10001C)9999D)99987.Ofthefollowing,productisanoddnumber?A)212×12B)12×121C)2×1212D)1×21218.IfisTuesday,20daysfromnowwillbeaA)B)C)D)Saturday9.ArnoldtheDogisholdingasquareboardhasaperimeterof12m.Howlongisoneoftheboard?A)2mB)3mC)4mD)5m10.10=?nickelsA)20B)12C)5D)211.Howwholenumbersaregreaterthan10andthan30?A)18B)19C)20D)2112.40+80+120=4×?A)60B)50C)40D)3013.I1dollar,2quarters,3dimes,and4nickels.Thismoneyisworththeamountas?pennies.A)150B)175C)184D)20014.37after6o’clockis?o’clock.A)1B)4C)7D)1215.Anelf’sincreasesby10cmeachyear.Agnome’sincreasesbythatamounteachyear.Iftheelfandthegnomewerethe2yearsago,howtallerthanthegnomewilltheelfbe2yearsfromtoday?A)10cmB)15cmC)20cmD)25cm16.Theof2,0,1,and1isA)0B)1C)2D)417.Thesumofallnumbersbetween1and9isA)8B)12C)20D)3518.Didithedogdancedforexactlyoneweek.ForhowhoursdidDididance?A)24B)84C)128D)16819.How25¢gumballscanIbuyfor$5?A)10B)20C)40D)8020.I60marbles.IfIputasmanyofthesemarblesasIcan7equalpiles,howmanymarblesareover?A)1B)4C)6D)1121.Whichis1000tensminus100tens?A)9000B)9900C)9990D)999922.I4567tothenearest10,thenI4567.IendupwithA)3B)33C)333D)543323.Iftheofarectangleis20andtwoofitssideseachaof4,whatistheofeachoftheothertwosides?A)16B)12C)8D)624.Ottodidahandstand,and1outof5pennieshehadinhispocketsfellout.Ifaof19penniesfellout,Ottomuststartedwith_?_penniesinhispockets.A)24B)76C)95D)11425.Itotakea75-minutenapstartingat5:15.TheusedtoendmynapshouldbesetforA)6:00B)6:15C)6:30D)6:4526.Theof4oddnumbersisalwaysA)evenB)oddC)primeD)than2027.TheBears'picnichastooants!Ifthenumberofantsisthewholenumbergreaterthan0isdivisiblebybot