Unit4教材提前看学习口号搞材难满冲刺搞定教材重难点，向满分冲刺！要点聚焦ModuleTwoUnit4NumbersUnit4NumbersTask:saydifferentkindsofnumbers三大模块三大模块词汇串串烧阅读任我行重难点操练挑战第一关：SaydifferentkindsofnumbersWhatdoyouknowabout…..?WeallusenumbersinourdailylifeNumbersareaninternationalyWeallusenumbersinourdailylife.Numbersareaninternationallanguage.Whatdoyouknowaboutthelanguageofnumbers?Trythisquiz.Matchthewordswiththesignsandnumbers.Matchthewordswiththesignsandnumbers.1adecimalnumber7add;plus2equal3apairofoddnumbers;p8subtract;minus9multiply3apairofoddnumbers4apairofevennumbers5afraction9multiply10divide11anumbershowingdegrees5afraction6zero11anumbershowingdegrees12apercentageab0cd5/85/8efghijkiBeforeyoureadBeforeyoureadthearticleonthenextpage,lookatthetitle,theypg,,introduction,theheadingsandthepictures.Thenonthelistbelow,tick(√)thethingsyouthinkthearticlemaytellyou.1Longago,thereweredifferentwaysofwritingnumbers.2Zeroisnotanumber.2Zeroisnotanumber.3Zeroisanespeciallyimportantnumber.4Machinesmakeiteasierforustocalculate4Machinesmakeiteasierforustocalculate.5Yourbrainmaycalculatebetterthanacomputer.6Yourbrainisanimportantpartofyourbody6Yourbrainisanimportantpartofyourbody.1Everyone’sLanguageHowmanylanguagesdoyouknow?Everyoneknowsatleasttwo—hisorHowmanylanguagesdoyouknow?Everyoneknowsatleasttwohisorherownlanguageandtheinternationallanguageofnumbers.AncientnumbersInancienttimes,peoplewrotenumbersinmanydifferentways,asthese,ppyy,picturesofthenumber6show.However,theynearlyallcountedinthesameway-intens.ZeroThesystemofnumbersthatnearlyeveryoneusestodayconsistsofyyyynumbersfrom1to9and0(zero).Withthesetennumbers,wecanwriteanynumberfromthebiggesttothesmallest.TheIndiansfirstinvented19fianddevelopedthe1to9systemofthenumbers.Theytheninventedzero.Thiswasaveryimportantinventionbecauseitmadeiteasiertowritebignumbersandtocalculatenumbersandtocalculate.calculatingmachinesgOneofthefirstcalculatingmachineswasanabacus.Abacusesaresofastandaccuratethatpeoplestillusethem...
