外研版Book1Module5VocabularyandspeakingPPT.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,外研版,高一年级(必修1),Module 5,Module 5,A Lesson in a Lab,Vocabulary and speaking,英语中基数词、序数词、分数、小数和百分数的读法,1.,基数词的读法,A.,先“几十”，再“几”，中间用连字符。,e.g.,23,89,B.,先“几百”，再加,and,再加末两位。,e.g.223,416,809,twenty-three,eighty-nine,two hundred and twenty-three,four hundred and sixteen,eight hundred and nine,C.1000,以上的数从后向前数，每三位数,加“,”,；第一个“,”,号前为,thousand;,第,二个“,”,号前为,million;,第三个“,”,号前,为,billion,。,e.g.1,001,9,743,750,000,000,one thousand and one,nine thousand,seven hundred and forty-three,seven hundred and fifty,million,2.,序数词的读法,序数词一般以与之相应的基数词加,-,th,构成，如：,tenth,（第十），但下面这些基数词在变序数词时，有特别的地方。,A.,one two,three five,eight nine,twelve,first,second,third,fifth,eighth,ninth,twelfth,B.,以,-,ty,结尾的词，先变,-y,为,-i,，再加,-eth,。,e.g.,twenty,forty,C.,以,one,two,three,five,nine,收尾的多位,数词，要照第一条方法变。,e.g.,twenty-one,twenty-two,ninety-nine,a hundred and fifty-three,twentieth,fortieth,twenty-first,twenty-second,ninety-ninth,a hundred,and fifty-third,基数词表示分子，序数词表示分母，分子大于,1,时，序数词要用复数。,e.g.1/4,2/3,7/9,5/12,one-fourth,two-thirds,seven-ninths,five-twelfths,3.,分数词的读法,特殊的表达法,a/one half,a/one quarter,three quarters,4.,小数的读法,7.8,0.125,14.397,seven point eight,zero point one two five,fourteen point three nine seven,5.,百分数的读法,27%,45%,86%,twenty-seven percent,forty-five percent,eighty-six percent,Can you say the following in English correctly?,1,000,2,000,12,000,112,000,796,000,one,thousand,two thousand,twelve,thousand,one hundred,twelve,thousand,seven hundred,ninety-six,thousand,879,457,eight hundred,seventy-nine thousand,four hundred and fifty-seven,1,000,000,9,000,000,32,000,000,212,000,000,one million,nine million,thirty-two million,two hundred,twelve million,Read these questions aloud and say the answers.,What is 1/2 of 6,000,000?,2.How much is 35,246,000 plus 12,800,000?,3.What is 25%,of 200,000,000?,three million,forty-eight million,forty-six thousand,fifty million,4.How much is 260,408,396 and 5,284,700?,two hundred,sixty-five million,six hundred,ninety-three thousand,ninety-six,5.What is of 1,000,500,000?,seven hundred,fifty million,three hundred,seventy-five thousand,6.What is 10%of 800,000,000?,eighty million,1/5,1/6,1/7,4/7,one fifth,one sixth,one seventh,four sevenths,Can you say the following in English correctly?,7/10,97/111,seven tenths,ninety-seven one hundred and elevenths,forty-five eighty-sevenths,总结,:,你能看出他们有什么特点吗？,45/87,分子用基数词,分母用序数词,;,分子大于,1,分母的序数词需要加,s,。,另外,还有几个特殊表达的情况,:,1/2,1/4,1/3,3/4,2/3,one half,one quarter,one third,three quarters,two thirds,Now say these fractions.,2/5,5/8,9/10,3/8,5/6,two-fifths,five-eighths,nine-tenths,three-eighths,five-sixths,Exercises,Can you say the following in English correctly?,0.5,0.8,0.76,1.23,point five,point eight,point seven six,one point two three,23.45,100.32,87.675,7.564,twenty-three point four five,one hundred point three two,eighty-seven point six seven,seven point five six four,1.Finish Exercise 9 on P93,.,2.Work in pairs.Give your partner five sums.Use numbers over a million.,