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Chapter4Theworldofnumbers,Vocabulary,A1evenodddecimal2Nineminustwentydivided3SecondthirdFifthtwelfth,Bevennumbers410301,0008602008oddnumbers315891937Fraction2/91/5Percentage41%75%53%,Numbersshowingdegrees603018032.5Decimalnumbers0.427.7731.1367.889.8,Conefourththreequarters/threefourthstwothirdsfourseventhsthirty-eightpointninenine,zeropointsixfiveseventeenmillion,fivehundredandforty-sixthousand,onehundredandninety-eightthreehundredandseventy-eightthousand,sixhundredandtwenty-four,fourthousand,fivehundredandforty-threeeighthundredandtwenty-fivethirdtwelfthfirst,twenty-firstsecondninthfifthfiftietheighthhundredth,D1modern2invented3Writedown4accurate5consistsof6powerful,A1Inancienttimes2indifferentways3standsfor4inaflash5Theyareabacuses6Howmanydoesknow7Whats,Sentencepatterns,8Dontuse9Cando10Whichabacus11comesfrom12standfor13Whatan,B1Fourtimesfiveistwenty.2Threeplusnineequalstwelve.3Tenminustwoiseight.4Eightdividedbyfourequalstwo.5Dontmakeanoise,please.,A1a2c3c4a5a6c7a,Grammer,9a10b11b12a13a14b15b,16a17c,B1first2twelfth3Multiply4fifth5Hundreds6twenty-sixth,7Dontbe8Four9multiplied10divided11added,C1two2thirty-six3forty-nine4five5thirty6six,A1c2a3b4a5a6c7c,Listening,8b9c10b,B2actor3morethantwenty419655Beijing619717six8three,91985101998,C1a2b3b4b5b,D1atleast2international3ancient4Indians5invented6developed7system,8consistsof9accurate10calculating11standfor12bottom13electronic14powerful,15flash,A1many2found3it4sat5Themouse,Reading,B1b2a3c,C1c2d3c4b5grades6low,7hard8good9best,A1useful2daily3save4improve5play6watch,Writing,B1Becausetheycanhelppeoplealotintheirdailylife.2Theythinkthatcomputerscanhelptheirchildrenimprovetheirstudiesatschool.,3Infact,manychildrenusecomputerstoplaygamesorwatchvideos.,ThewaytokeephealthyItisveryimportantforustokeephealthyinoureverydaylife.Buthow?Hereissomeadviceforyoutofollow.First,youshouldeatplentyoffreshfruitandvegetables,becauseourbodiesneedallkindsofvitaminseveryday.Butdonoteattoomuchfoodwithfat,suchasbutterorcheese.Alsoyoudbetternoteattoomanysweetsorchocolates,anddrinkaslittlecoffeeaspossible.Second,goodhabitscanhelpyoukeephealthy.Doingexerciseiscertainlyagoodwaytomakeyouhealthy.Afteradayswork,youneedtohaveagoodsleep,nole
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