2021学年Module 5 A Lesson in a Lab备课课件ppt

这是一份2021学年Module 5 A Lesson in a Lab备课课件ppt，共24页。PPT课件主要包含了Module 5， 基数词的读法， 序数词的读法，first，second，third，fifth，eighth，ninth，twelfth等内容，欢迎下载使用。

Vcabulary and speaking
英语中基数词、序数词、分数、小数和百分数的读法
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
tw hundred and twenty-three
fur 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thusand; 第 二个“,”号前为millin; 第三个“,”号前 为billin。
e.g. 1,001— 9,743— 750,000,000— 14,800,000,000—在这类数词中，hundred, thusand, billin, millin 等词都用单数形式。
ne thusand and ne
nine thusand, seven hundred and frty-three
seven hundred and fiftymillin
furteen billin eight hundred millin
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. ne — tw — three— five— eight — nine— twelve—
B. 以-ty结尾的词，先变-y为-i，再加-eth。e.g. twenty— frty—C. 以ne, tw, three, five, nine收尾的多位 数词，要照第一条方法变。e.g. twenty-ne— twenty-tw — ninety-nine— a hundred and fifty-three —
twenty-first
twenty-secnd
ninety-ninth
a hundredand 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—
seven-ninths
five-twelfths
a / ne half
a / ne quarter
three quarters
7.8— 0.125— 14.397—
seven pint eight
zer pint ne tw five
furteen pint three nine seven
5. 百分数的读法27% —45% —86% —
twenty-seven percent
frty-five percent
eighty-six percent
Can yu say the fllwing in English crrectly?
1,000 2,000 12,000 112,000796,000
twelve thusand
ne hundred, twelve thusand
seven hundred, ninety-six thusand
eight hundred, seventy-nine thusand, fur hundred and fifty-seven
1,000,000 9,000,00032,000,000 212,000,000
ne millin nine millinthirty-tw millintw hundred, twelve millin
Read these questins alud and say the answers.
What is 1 / 2 f 6,000,000?2. Hw much is 35,246,000 plus 12,800,000?3. What is 25% f 200,000,000?
three millin
frty-eight millin, frty-six thusand
fifty millin
4. Hw much is 260,408,396 and 5,284,700? tw hundred, sixty-five millin, six hundred, ninety-three thusand, ninety-six 5. What is ¾ f 1,000,500,000? seven hundred, fifty millin, three hundred, seventy-five thusand 6. What is 10% f 800,000,000? eighty millin
1/5 1/61/74/7
ne fifthne sixthne seventhfur sevenths
7/10 97/111
seven tenths ninety-seven ne hundred and elevenths frty-five eighty-sevenths
总结: 你能看出他们有什么特点吗？
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:1/21/4 1/3 3/42/3
ne half ne quarter ne third three quarters tw thirds
Nw say these fractins. 2/5 5/8 9/10 3/8 5/6
five-eighths
nine-tenths
three-eighths
five-sixths
pint fivepint eight pint seven sixne pint tw three
twenty-three pint fur five
ne hundred pint three tw
eighty-seven pint six seven
seven pint five six fur
1. Preview READING abut wrds and expressins n page 44-45. 2. Preview LISTENING AND WRITING n page 46-47.
1. Finish Exercise 9 n P93.2. Wrk in pairs. Give yur partner five sums. Use numbers ver a millin.