英语四年级上册-四年级上册unit9课件.ppt

1、Whats your luncky number?你的幸运数字是什么？你的幸运数字是什么？one hundredtwentythirtyfortyfiftysixtyseventyeightyninety12+8=24+6=38+2=42+8=53+7=67+3=71+9=82+8=99+1=20 twenty30 thirty40 forty50 fifty60 sixty70 seventy80 eighty90 ninety100 a hundred整十位数数词整十位数数词20-90构成：构成：个位数词词尾加个位数词词尾加-ty找规律two twelve three thirteen f

2、our fourteenfive fifteen sevenseventeensix sixteeneight eighteennine ninteentwentythirtyfortyfiftysixtyeightyninty表示十几的数字都是以teen结尾，发/ti:n/的音。表示几十的数字都是以ty结尾，发/ti/的音。seventySay a rhyme英语数词不难记，英语数词不难记，找出规律就容易。找出规律就容易。一至十二词各异，一至十二词各异，一个一个单独记。一个一个单独记。后面加后面加teenteen变十几，变十几，thirteenthirteen，fifteenfifteen看

3、仔细。看仔细。EighteenEighteen只有一个只有一个t t，两个音节念清晰。，两个音节念清晰。二十至九十后加二十至九十后加tyty，twentytwenty不同重点记。不同重点记。FortyForty去掉字母去掉字母u u，thirtythirty，fiftyfifty更出奇。更出奇。十位数后个位数，十位数后个位数，表示数值几十几，表示数值几十几，按序排列不费力，按序排列不费力，连字符号莫丢弃。连字符号莫丢弃。巧学妙记加努力，巧学妙记加努力，hundredhundred是你的好成绩！是你的好成绩！Can you say it in English?2132435465twenty-o

4、nethirty-twoforty-threefifty-foursixty-five76879899100seventy-sixeighty-sevenninety-eightninety-nineone hundredtwenty-two twenty-three twenty-four twenty-fivetwenty-six twenty-seventwenty-eight twenty-ninetwenty+one=twenty-one25465391688935742792Practice 请用英语表达下列算式请用英语表达下列算式21+11=3220+23=4341+13=545

5、6+9=6565+33=88Twenty-one and eleven is thirty-two.Twenty and twenty-three is forty-three.Forty-one and thirteen is fifty-four.Fifty-six and nine is sixty-five.Sixty-five and thirty-three is eighty-eight.andisLook and say20+11=3213+3=1634+10=4437+63=10050+23=7354+32=8612+59=7198+2=100Look and judgeFo

6、rty-six and fifty-four is ninety.Twenty-four and ten is thirty-four.Sixteen and sixty is sixty-six.Thirteen and fifty-four is sixty-six.超人大考验超人大考验!Do you want to be(成为成为)superman?There are three challenges(挑战挑战).Have a try!Standing on one foot.单脚站立单脚站立!参加比赛的同学，闭上眼睛，单腿参加比赛的同学，闭上眼睛，单腿离地。其余同学边数数离地。其余同学边数数one，two，three边给他们鼓劲，脚最后一个边给他们鼓劲，脚最后一个落地的学生为优胜。落地的学生为优胜。New wordhomeworkrightwrong