外研版必修1 Module 5 A Lesson in a Lab Vocabulary and speaking课件（24张ppt）
文档属性
| 名称 | 外研版必修1 Module 5 A Lesson in a Lab Vocabulary and speaking课件（24张ppt） |  | |
| 格式 | zip | ||
| 文件大小 | 1.4MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版 | ||
| 科目 | 英语 | ||
| 更新时间 | 2022-01-27 14:33:15 | ||
图片预览
文档简介
(共24张PPT)
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—
14,800,000,000—
在这类数词中，hundred, thousand, billion,
million 等词都用单数形式。
one thousand and one
nine thousand, seven hundred and forty-three
seven hundred and fifty
million
fourteen billion eight
hundred 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
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. Preview READING about words and
expressions on page 44-45.
2. Preview LISTENING AND WRITING on page 46-47.
1. Finish Exercise 9 on P93.
2. Work in pairs. Give your partner five sums. Use numbers over a million.
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—
14,800,000,000—
在这类数词中，hundred, thousand, billion,
million 等词都用单数形式。
one thousand and one
nine thousand, seven hundred and forty-three
seven hundred and fifty
million
fourteen billion eight
hundred 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
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. Preview READING about words and
expressions on page 44-45.
2. Preview LISTENING AND WRITING on page 46-47.
1. Finish Exercise 9 on P93.
2. Work in pairs. Give your partner five sums. Use numbers over a million.