七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版.ppt

《七年级英语上册 chapter 4 The world of numbers 课件 深圳牛津版.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Chapter4TheworldofnumbersContentsReadingListeningLanguageSpeakingWritingReadingAWhatdoyouknowabout…Weallusenumbersinourdailylife.Numbersareaninternationallanguage.Whatdoyouknowaboutthelanguageofnumbers?Learnthefollowing:Adecimalnumberiswrittenasadot.eg.0.

2、65(zeropointsixfive/sixty-five)8.08(eightpointoeight.)Readthefollowing:7.53,3.42,0.01,86.201adecimalnumber(小数）Oddnumberscannotbedividedbytwotogiveawholenumberwithoutafraction.2oddnumbers(奇数）3evennumbers(奇数）Evennumberscanbedividedbytwotogiveawholenumber.Afract

3、ionistheexactdivisionofanumber.eg.½:onehalf2/3:twothirds¼aquarter1/10onetenthReadthefollowing:3/5,6/11,1/84afraction(分数）5plus,add(加）２＋５＝７Twoplusfiveisseven.Twoandfiveisseven.Twoaddedtofiveisseven.3+12=?Whatis3plustwelve?Readthefollowing:25+24=4930+12=?6minus(

4、减，减号，负号）subtract(减)12-3=9Twelveminusthreeisnine.Threesubtractedfromtwelveisnine.Readthefollowing:2-2=019-12=797-65=?7times,multiply乘２×３＝６Twotimesthreeissix.Twoandthreemultiplymakessix.Twomultipliedbythreemakes6.Readthefollowing:16×4=645×3=158divide除30÷6=5Thir

5、tydividedbysixisfive.Readthefollowing:20÷4=518÷3=645%=90oapercentageequalsanumbershowingdegreesMatchthewordswiththepictures,signsandnumbers.1ademicalnumber2apairofoddnumbers3afraction4zero5add;plus6subtract;minus7multiply,times8divide9anumbershowingdegrees10a

6、percentage11apairofnumbers12equalsAWhatdoyouknowabout…jfcbalidhkgeVocabulary1abacus:anoldformofcalculator2accurate:withnomistakes3ancient:veryold4atleast:notlessthan5bead:asmallballwithaholethroughthemiddle6calculate:usenumberstofindanswers7consistof:bemadeup

7、ofsomething8develop:growbiggerand/orbetter9electronic:usingelectronsforpowerVocabulary10electronic:usingelectronsforpower11figure:asymbolratherthanaword12flash:averyshorttime,aninstant13however:yet14international:connectedtomorethanonecountryornation15invent:

8、makeforthefirsttime16nearly:almost17powerful:strong18system:groupofthings/partsthatworktogetherFillintheblankswithcorrectwords.Ifyou_______8and5,youget13.Iusethepocket___________tocheckmy