参考文稿教程

Name: Exercise1:(20%@

MathsPrimary6Date: Percentage(2)百分數(2)

Marks: SolvethefollowingFind10%ofFind40%ofWhatpercentageof1kmisWhatpercentageof3Lis500Rayspends45minutesonpracticingtabletenniseveryday.Yesterdayheincreasedhispracticingtimeby20%.Howlongdidshepracticetabletennisyesterday?Afterspending20%ofmymoney,IfoundthatIstillhad$200.HowmuchdidIhaveatfirst?If70%oftheheightofatreeis3.5m.HowtallistheThenumberofbooksinthelibraryincreasedby8%fromlastyear.Thereare5400booksthisyear.Howmanybooksweretherelastyear?Timis25%olderthanJohn.Johnisy%youngerthanTim.FindPeter’sweightincreasedfrom44kgto56kgthisyear.WhatisthepercentagePerimeterandAreaExercise2:(20%@SolvethefollowingWhatstheperimeterofasquarewhichhasanareaof361m2Whatisthecostof3squarepiecesofglass20cmlongat$5percm2Howmany6-cmlengthsquarescanbecutfromapieceofpaperwhichisa30-cmlengthsquare?Ifitcosts$840tofenceafieldwhichis19mlongand16mwide,whatisthecostofthefence(柵欄)permetre?Perimeterofarectangleis104cm.Thelengthis30cm.FinditsIftheareaofarectangleis102cmofthe

andoneofitssidesis17cm.FindtheTheperimeterofarectangleis46cm.Itswidthis3cm.FinditsAwallis15mby20m.Thereisawindow2mby6minit.Findthecostofpaintingthewallat$2persq.metre?Acourtyard(庭院),45mlongand36mwide,hastobecoveredwithconcrete(混凝土)blocks(磚塊),each3mby2m.Howmanyblocksareneeded?Aboard5mby2mispaintedonbothsides.Findthecostofpaintingat$11persq.VolumeExercise3:(30%@SolvethefollowingThelengthofacuboid(長方體is60cm.Itswidthishalfofitslength.Itsheight1ofitslength.Whatisthevolumeofthis3Arectangularboxis6metreslong,4metreswideand4metreshigh.Howmany40-cmlongcubicalboxescanithold?Alargerectangularboxis40cmlong,24cmwideand20cmhigh.Howmanysmallrectangularboxescanitholdifthesmallrectangularboxis8cmlong,6cmwideand4cmhigh?Thereisaclassroom12metresby10metresby4metres.If5mneededforeachpupil,howmanypupilsarethereinthis

ofairspaceThebaseareaofacube(立方體is100cm2FinditsThevolumeofacubeis216cm3.FinditsThereare100piecesof1-cmifIwanttomakealarger

puzzle.HowmanymorepiecesofpuzzledoIFindthelengthofapoolwhichhasavolumeof45m3anditswidthandheightare5mand1.5mrespectively.Acubeis80cmlong.Ifthehalf-filledwithwater,findthevolumeoftheHowmany5-cmcubescanbeputintoa30-cmThevolumeofacubeis4096cm3andthebaseareais256cm2.FinditsHowmany2-cmcubescanbecutfroma6-cmThevolumeofacubeis8000cm3.Howmany10-cmcubescanbecutfromHowmany3-cmcubesdoesa12cmby6cmby3cmcuboidHowmanypiecesofwood,eachmeasuring5cmby3cmby2cm,canbecutfromapiece10cmby9cmby8cm?SpeedExercise4:(30%@SolvethefollowingThomascanrun100min40seconds.FindhisaveragespeedinStephaniefinished941min101s.Findherrunning Mr.Makdrove266kmin3.5h.FindhistravelingAcarcovered(行過34kmin25minutes.FinditsspeedinWhenRoyruns,hisaveragespeedis6m/s.Howfarcanherunin7Acoach(旅遊巴士travelledat45km/h.Itsetoffat10o’clockinthemorningandarrivedatitsdestination(目的地)at1o’clockintheafternoon.Howfardidittravel?Tomcycledat15km/h.Howlongdidhetaketocompleteajourneyof24Atraintravelledat31.25km/htothenextstation12.5kmaway.Ittookoffatp.m.WhenwoulditarriveatthenextRayleavesshopAat1:02p.m.andarrivesatshopCat1:15p.m.throughshopB.Findhisspeed.B CarAandCarBbothstartfromthesameceatthesametimeandinthesamedirection,at35km/hand42km/hrespectively.Howfarapartwilltheybeafter13TonyandMarkhadarace.Tonyranat1.2m/swhileMarkranat0.9m/s.Howapartwerethey

56CarXandCarYbothstartfromthesameceatthesametimebutinoppositedirections,at35km/hand42km/hrespectively.Howfarapartwilltheybeafter13Stephanie’swalkingspeedis0.6m/s,whil