Unit 2 Numbers-Introduction s about numbers.ppt

1、Module 1 Unit 2 Numbers,Introductions about numbers,What do you know about the language of numbers?,We all use numbers in our daily life. Numbers are an international language.,A decimal number is written as a dot. eg. 0.65 (zero point six five/ sixty-five) 8.08 (eight point o eight.) Read the follo

2、wing: 7.53, 3.42, 0.01, 86.20,1 a decimal number( 小數(shù)）,A fraction is the exact division of a number. eg. : one half 2/3: two-thirds a quarter 1/10 one-tenth Read the following: 3/5, 6/11, 1/8,2 a fraction (分數(shù)）,Odd numbers cannot be divided by two to give a whole number without a fraction.,3 odd numbe

3、rs (奇數(shù)）,4 even numbers 偶數(shù)）,Even numbers can be divided by two to give a whole number.,5 plus , add (加）, Two plus five is seven. Two and five is seven. 3+ 12 =? What (How much) is 3 plus twelve? Read the following: 25 + 24 = 49 30 + 12 = ?,6 minus (減，減號，負號） subtract (減),12-3=9 Twelve minus three is n

4、ine. Three subtracted from twelve is nine. Read the following: 2-2=0 19- 12=7 97-65=?,7 multiply 乘, Two times three is six. Two multiplied by three is 6. Read the following: 16 4 = 64 5 3 = 15,8 divide 除,30 6 = 5 Thirty divided by six is five. Read the following: 20 4 = 5 18 3 = 6,Speaking,Talk time

5、,1.Say these cardinal numbers.,284,653 two hundred and eighty-four thousand six hundred and fifty-three 1,367,982 one million three hundred and sixty-seven thousand nine hundred and eighty-two,（1）billion ,million, thousand 后面的位數(shù)上為非零的數(shù)字時，則不要加and ,如下列數(shù)字,2，008 two thousand and eight 706 seven hundred a

6、nd six,（2） billion ,million, thousand 后面的位數(shù)上為零的數(shù)字時，則要加and ,如下列數(shù)字,2 Say these sentences with ordinal numbers.,Where do they live? May: 1 May is on the first floor. Alan: 2 Alan is the second floor. Danny: 3 Danny is the third floor. June: 9 June is the ninth floor. Peter: 12 Peter is the twelfth floo

7、r. Alice: 19 Alice is the nineteenth floor. Steve: 40 Steve is the fortieth floor.,3 Say these decimals.,.3 : point three 0.3 zero point three .368 point three six eight 7.145 seven point one four five 36.36 thirty-six point three six,4 Say these telephone numbers.,3921 5143 3565 1351 3471 0122 3389

8、 4167,When we say telephone or ID card numbers, we say each number separately. For 0 we say zero or o. When two of the same number are together, we can say double before the number.,Exercise,1.Read the following:,300,305,315,433,4,500,5,345,6,605,7,056,three hundred,three hundred and five,three hund

9、red and fifteen,four thousand five hundred,four hundred and thirty-three,five thousand three hundred and forty-five,six thousand six hundred and five,seven thousand and fifty-six,166 1502 36% 0.75 5.05 41 27 2006 1/5 3/5,one hundred and sixty six.,one thousand five hundred and two.,thirty-six percen

10、t.,zero point seven five.,five point o five.,forty-one degree.,twenty-seven degree.,two thousand and six./Two OO Six.,2.Say out the following numbers.,one-fifth.,three-fifths,3.using pronouns,11 plus 1 equals 12.（11+1=12） 2. _ m_ _ e_ _. 3. _ m_ by _ e_ _. 4. _ d_ by _ e_ _. 5. _ p_ _ e_ _. 6. _ p_

11、_ d_ by_e_ _. 7._ m_ _m_ by_ e_ _,13,inus,5,quals 8,7 ultiplied 8 quals 56,16 ivide 4 quals 4,9 lus 6 quals 4,14 lus 4 ivided 2 quals 9,19 inus 9 ultiplied 3 quals 30,分數(shù)，小數(shù) one-sixth six hundredths zero point seven a quarter a half three fifths of a foot three quarters of the money,1/6 6/100 0.7 1/4

12、 1/2 五分之三英尺 四分之三的錢,日期 5月1日 May 1 1 May,May the first the first of May,1998 2005 21世紀,nineteen ninety-eight two thousand and five the twenty-first century,百分數(shù) 25 0.28,twenty-five percent zero point two eight percent,時間 5:20 11:50 2:45 8:00 a.m. 5:25 p.m.,twenty past five ten to twelve a quarter to th

13、ree eight a.m. five twenty-five p.m.,年齡 20多歲 40出頭 快50歲,in ones twenties in ones early forties in ones late forties,編號 第八課 第11頁,Lesson Eight = the Eighth Lesson page eleven = the eleventh page,Different expressions about numbers.,房號： 1103 - Room 1103 班級、年級 Class 6, Grade 9 時間： 6：50 six fifty; ten to seven 年、月、日： 1986/12/6- December the sixth, nineteen eighty-six 溫度： 36Cthirty-six Celsius degree 序數(shù)： 12th twelfth 14th fourteent