五年级数学上册易错题答案Word文件下载.docx

五年级数学上册易错题答案Word文件下载.docx

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Five"

approach"

theapproximatevalueis8.50,thethreedecimalplaces,themaximummaybe（）,thesmallestmaybe（）.

3,known:

17=0.142857,thentherepeatingdecimaldecimalpointbehindthe170ththenumberis（）.

4and0.7ofsevenpercentare（）.

5,schoolstobuyfootballayuanpergame,eachbasketballlessthanfootball5yuan.

A-5means（）,2a-5means（）.

6,twoBmultiplicationproductplusa（）isexpressedwithformula.

7,36minutes=（）hours

8,aBook160pages,XiaoHongfirstreadmpage,seconddaysfrom（）pagetosee.

9,LANreada242pagestorybook,readmpages5daysago,readtheremaining6days,readonaverageeveryday.

10,thenumberofmaleteachersinschoolsis3.5timesthatoffemaleteachers,maleteachersare3timesmorethanfemaleteachers,and4aremaleteachers.

11,8.25,=（）time（）

12and7200M2=（）ha

13,aparallelogrambottomis7decimeterheightis4decimeters,ifthebottomandexpand10times,itexpandstheareaof（）（）istimessquaredecimeter.

14,abagofriceXkg,withaloadofYtonsoftrucks,acantransport（）bag.

Two,judgment

1,decimaldividedbyinteger,quotientmustbedecimal.（）

Three,select

1,pleaseselecttheappropriateconditionsinthepicture（"

V"

）,thencalculatetheanswercolumn.

A,B,tworoadrepairteamsatthesametimerepairahighway,andaskthearmorteamhowmanymetersperday?

（）

（1）ahighway3750meterslong

（b）

（2）Bteamaverages85metersperday

（）（3）whenfinished,ateamlessthantheteamB500meters

（）（4）thetwoteamswillberepairedtogetherfor25days

2,between0.5andtwo,thedecimalnumberhas（）0.6.

A,9B,10C,countless

Thequotientof3andtwonumbersis15,andtheremainderis2.Ifthedivisoranddivisorareexpanded100times,thenewquotientandremainderare（）.

A,15......2,B,15......20,C,15......200,D,1500......Twohundred

Four,simplecalculation

32x1.25x2.5,0.8x16.5x12.5,0.125*32+5.28

0.32x9.9,17.5*12.5-1.75*45+0.175*200

0.85x0.5+0.25x0.3,8.9*1.1+15.7*8.9+6.8*1.1

5.4"

（0.27x4）3.875*25.7+3.875*74.2+6.125*99.9

Five,columncalculation

1.Moveadecimalpointtotherightonebit,19.8largerthantheoriginalnumber.Whatistheoriginaldecimalnumber?

2.Moveonedecimalpointtotheleft,3.96lessthantheoriginalnumber.What'

stheoriginaldecimalnumber?

Six,solvetheproblem

1,akindofcottoncloth,4.16yuanpermeter,buy2.4meters,howmuchshoulddealwith?

2,IandmymomanddadgototheGreatWall（fare25.5yuanperperson,halfpriceforchildren）round-triptransportationtomanyyuan?

3.Theproductofthefactorisretainedtotwodecimalplaces.5.40,pleasewriteitsexactvalue.Whatisthepossiblenumber?

（limitedtothreedecimalplaces）

4,XiaoMing4testaveragescoreof78.5points,hewouldliketonexttest,theaveragescoreincreasedto80points,then,inthefifthtest,howmanypointsdidheget?

5,thetortoiseandtheharerace,thewholejourney2000meters,thetortoiseclimbs20meterseveryminute,therabbitruns300meterseveryminute.TheHarethoughthecouldrunfastandsleptontheway.Asaresult,theharewas20metersfromthefinishlineattheendofthetortoise.Howmanyminutesdidtherabbitsleep?

6,Guangmingprimaryschoolfiveorsixstudents,atotalof308peopletovisitthemuseum,arrangedintwocolumns,aroundtwostudentsare0.5metersaway,theteamwalk65metersperminute.Now,howmanyminutesdoesittaketogothrougha898.5meterlongbridgefromthetopofthebridgetotheendofthebridge?

7,acarfromatoB,3hoursfor204kilometers,therestofthejourneytotheoriginalspeedfor2.5hours,aandBbothawayishowmanykilometers?

Seven,outwardboundtraining

Whatis1and10/7ofthe100thdigitsafterthedecimalpoint?

Howabout101st?

2,abasketofapples,ifsoldat1.6yuanperkilogram,willlose9yuan;

ifyousellat2.1yuanperkilogram,itwillearn6yuan.Ifyoudonotearnorlose,howmuchshouldyousellperkilogram?

Equationelement

1,thenumberis30,lessthanthenumberofB,B,Bnumberis（）.

2,apileofsandxtons,is7timesthepileofsand,

ThereisatonofsandintheBpile.

3,if36=,a+,a+,a=B+,B=C+,C+,C+,C,thena+,B+,C=（）

4,comparethesizeofXandy.

（1）x+1.5=y+4.5,thenx（）y.

（2）x,-4.5=y,-1.5,thenx（）y.

5.CalculatethevaluesofaandBbasedonthegivenequation.

3.5A=17.5B,whereaandBaretwonaturalnumbersthatarenot0.WhataretheminimumnumbersofaandB?

6,acarSkilometersperhour,4hoursaftertheremainingakm,th