資源簡介

(共41張PPT)
Unit 2 Amazing numbers
主題范疇：
人與社會
主題群：
歷史、社會與文化；科學(xué)與技術(shù)
子主題：
對世界、國家、人民和社會進步有突出貢獻的人物；科學(xué)技術(shù)與工程，人類發(fā)明與創(chuàng)新
Key question
What is the role of numbers in our daily lives
master the rules of using cardinal numbers and ordinal numbers;
give correct instructions about numbers.
Learning objectives 學(xué)習(xí)目標(biāo)
At the end of the class, I’ll be able to:
1. The number of students in our class is 40.
2. I’d like one grain of rice for the first square of the chessboard, …
3. It is worth three hundred.
4. The little boy was born in 11 Dec. 2018.
5. Mo Yan won the Nobel Prize for Literature in 2012.
6. Who is the woman, the second in the second line
Have a look
A Cardinal numbers
1. The concept of cardinal numbers
2. The formation of cardinal numbers
3. The usage of cardinal numbers
Section 2 Exploring and applying rules
The concept of cardinal numbers
We use cardinal numbers to count things.
1. People from about 180 countries and areas live
in New York.
2. The CN Tower is 1,815 feet tall.
3. Red Square in Moscow is about 91,000 square
metres in size.
4. France has an area of over 26,000 square miles.
5. There are about 8,000,000 people living in London.
6. Tokyo, the capital of Japan, has over 13,000,000
people.
0～12為基本單詞：
zero one two three four five
six seven eight nine ten eleven
twelve
13～19為對應(yīng)的個位數(shù)單詞（或變形）后加-teen：
thirteen fourteen
fifteen sixteen
seventeen eighteen
nineteen
3 three 13 thirteen
11 eleven 15 fifteen
12 twelve 18 eighteen
The formation of cardinal numbers
20～90為其對應(yīng)個位數(shù)單詞（或變形）后加-ty：
twenty thirty forty fifty sixty
seventy eighty ninety
21～99的兩位數(shù)，十位與個位之間用連字符“-”：
26 twenty-six 99 ninety-nine
When we say thirteen, we stress the second syllable. When we say thirty, we stress the first syllable.
20 twenty 70 seventy
30 thirty 82 eighty-two
50 fifty 98 ninety-eight
100 one hundred
200 two hundred
375 three hundred and seventy-five
101～999的三位數(shù)，百位數(shù)和十位數(shù)（若無十位數(shù)則和個位數(shù)）之間用and連接，百后用單數(shù)形式：
103 a/one hundred and three
225 two hundred and twenty-five
999 nine hundred and ninety-nine
多位數(shù)：
注意每三個數(shù)為一個單位，按照百、十、個向下讀。
6
,
500
,
431
,
729
billion
million
thousand
seven hundred and twenty-nine
six billion,
five hundred million,
four hundred and thirty-one thousand,
在英語中，對于萬以上的數(shù)字，我們該如何表達呢？這就要記住英語數(shù)字讀法特點。以下面一個數(shù)字為例：
Let’s sum up the rules!
When we read out numbers, we do not add -s to the words hundred, _________, _________, and __________.
We put ________ between hundred and ten.
thousand
million
billion
and
表示數(shù)量：one book (一本書)；three apples (三個蘋果)。
表示時刻、年份、年代：nine o’clock (九點鐘)；in two thousand and twenty (在2020年)；in the 1960s (在20世紀(jì)60年代)。
表示年齡：He is ten (years old). (他十歲了)；in one’s thirties (在某人三十幾歲時)。
表示事物編號：Room 105(105房間)；Lesson One (第一課)；Bus No.10 (10路公共汽車)。
表示電話號碼：Phone number 6225371 (電話號碼 6225371)。
數(shù)學(xué)運算：Two and three is five. (二加三等于五)。
The usage of cardinal numbers
1) hundred, thousand, million, billion這些詞前面若有表示具體數(shù)字的詞時，它們不能加“s”，反之要加“s”，并與of短語連用。
three thousand people
thousands of people
2) 年份用基數(shù)詞表示，分兩位一讀，年份前面用介詞in。
在1999年
in nineteen ninety-nine
Tips
3) 表示整十的基數(shù)詞用復(fù)數(shù)形式可以表示人的大約歲數(shù)或年代。
在他二十歲出頭時
在20世紀(jì)30年代
in his early twenties
in the 1930s
讀作 in the nineteen thirties
4,056
= four thousand and fifty-six
23,813
= twenty-three thousand eight hundred and thirteen
567,110
= five hundred and sixty-seven thousand one hundred and ten
6,425,200
= six million four hundred and twenty-five thousand two hundred
How do we say the following numbers
Practice
B Ordinal numbers
1. The concept of ordinal numbers
2. The formation of ordinal numbers
3. The usage of ordinal numbers
We use ordinal numbers to show the order of things.
Women’s Day is on the eighth of March.
Our flat is on the seventh floor.
He is always the first to come to the school in our class.
The concept of ordinal numbers
1) 一般來說，是由相應(yīng)的基數(shù)詞加詞尾th構(gòu)成。
◇ four + th
◇ seven + th
◇ ten + th
2) 有些基數(shù)詞在變?yōu)樾驍?shù)詞時，有特殊的變化。
◇ one ◇ two
◇ three ◇ five
◇ eight ◇ nine
◇ twelve
→ fourth
→ seventh
→ tenth
→ first
→ third
→ eighth
→ twelfth
→ second
→ fifth
→ ninth
The formation of ordinal numbers
3) 十位整數(shù)序數(shù)詞的構(gòu)成方法是將基數(shù)詞的詞尾y變成i，然后再加eth。
◇ twenty
◇ thirty
→ twentieth
→ thirtieth
◇ twenty-one
◇ thirty-five
◇ a hundred and fifty-three
4) 兩位或兩位以上的基數(shù)詞變成序數(shù)詞時，僅將個位數(shù)變成序數(shù)詞。
→ twenty-first
→ thirty-fifth
→ a hundred and fifty-third
◇ forty
◇ ninety
→ fortieth
→ ninetieth
Learn the numbers and find out the rules.
Work out the rule
We form most ordinal numbers by adding ____ to the cardinal numbers, except first, second and third. For numbers of 21 and above, the ordinal number is formed based on the last digit (21st, 22nd, 23rd, etc.).
-th
基變序，有規(guī)律，詞尾加上th。一二三特殊記，詞尾字母t,d,d。八加h，九減e，ve要用f替。ty要變tie，然后再加th。若是遇上幾十幾，只變個位就可以。
The usage of ordinal numbers
表示順序：常與定冠詞“the”連用。the first day of the month (這個月的第一天)；the second chapter (第二章)；the third floor (三樓)；on his fourteenth birthday (在他十四歲生日那天)。
表示日期：June 1st (六月一日)，讀作“June the first”；in the twenty-first century (在21世紀(jì))
用于最高級前加強語氣：He is the second tallest boy in our class. (他是我們班第二高的男孩)。
分?jǐn)?shù)表達：分子用基數(shù)詞，分母用序數(shù)詞。當(dāng)分子大于1時，分母用復(fù)數(shù)。one fifth (五分之一)；two thirds (三分之二)。
1) 序數(shù)詞前面通常要加定冠詞the，但當(dāng)序數(shù)詞作定語修飾名詞且前面有形容詞性物主代詞或名詞所有格時，the可以省略。
Take the first right.
My first teacher
Lily’s third book
我的第一個老師
莉莉的第三本書
在第一個路口向右拐。
Tips
2) 日期可以用基數(shù)詞或序數(shù)詞來表示。讀時前面要加定冠詞the，日期前面要用介詞on。
在6月1日
3) 編號可以用基數(shù)詞或序數(shù)詞來表示。序數(shù)詞位于名詞之前，前面要加定冠詞the，而基數(shù)詞位于名詞之后，且名詞和基數(shù)詞的首字母都要大寫。
the second part = Part Two
on June 1 / on June 1st
讀作 on June the first
Instructions about
numbers
Can you give correct instructions about addition (加法), subtraction (減法), multiplication (乘法) and division (除法)
3+9
9-3
3×9
9÷3
Add 3 and 9.
Subtract 3 from 9.
Multiply 3 by 9.
Divide 9 by 3.
用英語描述算式時，多用祈使句。這些祈使句由表示加、減、乘、除的動詞開頭，但要注意每個動詞各自的搭配習(xí)慣。
Table I
Look & Learn
上述幾個結(jié)構(gòu)中的3 plus 9，9 multiplied by 3等作主語，要把它們看成是一個整體，謂語動詞要用單數(shù)形式is或equals。
Table II
3+9=12
9-3=6
3×9=27
9÷3=3
3 plus 9 equals/is 12.
9 minus 3 equals/is 6.
3 multiplied by 9 equals/is 27.
9 divided by 3 equals/is 3.
Plus and minus are prepositions.
祈使句 “主一系一表” 結(jié)構(gòu)
加 (A+B) Add A and B. A plus B
equals/is (A+B).
減 (A-B) Subtract B from A. A minus B
equals/is (A-B).
乘(A×B) Multiply A by B. A multiplied by B equals/is (A×B).
除(A÷B) Divide A by B. A divided by B equals/is (A÷B).
In pairs, complete the sentences like those in Table I and Table II.
1 S1: A 11 1.
S2: p equals/is . ( )
2 S1: S 5 13.
S2: m equals/is . ( )
3 S1: M 7 8.
S2: m by equals/is . ( )
and
ubtract
from
13
inus
5
8
13-5=8
ultiply
by
7
ultiplied
8
56
7x8=56
dd
11
lus
1
12
11+1=12
4 S1: D 16 4.
S2: d by equals/is . ( )
5 S1: A 9 6.
S2: p equals/is . ( )
6 S1: A 14 and 4 and d the answer by 2.
S2: p and d the answer by
equals/is . ( )
ivide
by
16
ivided
4
4
16÷4= 4
dd
and
9
lus
6
15
9+6= 15
dd
ivide
14
lus
4
ivide
2
9
(14+4)÷2= 9
Add 6 and 8.
6 plus 8 is/equals 14.
Use the numbers from the chart to give instructions about numbers.
基數(shù)詞表示數(shù)量的多少，常用來談?wù)摂?shù)目、時間等，如：eleven miles，nine o’clock等。
序數(shù)詞表示事物的順序，常用來談?wù)撊掌凇菍印⑽恢玫龋纾簅n 10th May等。
數(shù)字運算:
Practice
1 Look at the information about the three longest rivers in the world. Take turns asking and answering questions about the rivers.
S1: Which is the first-longest river in the world Where is it How long is it
S2: The Nile River is the first-longest river: it’s in Africa. it’s about 6,671 km long.
The Nile River
Africa
6,671 km
The Amazon River
South America
6,480 km
The Yangtze River
Asia
6,300 km
2 Look at the list of the highest mountains in Asia, North America and Africa. Describe the mountains with cardinal and ordinal numbers.
Rank Name Height Continent
1 Mt. Qomolangma 8,848.86 m Asia
2 Mt. Qogir 8,611 m Asia
3 Mt. Kanchenjunga 8,586 m Asia
The tallest mountain in ... is ... It is ... metres high.
... is the second-highest mountain in ...
Rank Name Height Continent
1 Mt. Denali 6,190 m North America
2 Mt. Logan 5,959 m North America
3 Pico de Orizaba 5,610 m North America
The tallest mountain in ... is ... It is ... metres high.
... is the second-highest mountain in ...
Rank Name Height Continent
1 Mt. Kilimanjaro 5,895 m Africa
2 Mt. Kenya 5,199 m Africa
3 Mt. Stanley 5,109 m Africa
The tallest mountain in ... is ... It is ... metres high.
... is the second-highest mountain in ...
一、單項選擇
( ) 1. Lesson _____ is on _____ page of the Chinese book.
A. Six; the twenty-fourth
B. Sixth; the twenty-fourth
C. Six; twenty-four
D. Sixth; twenty-four
( ) 2. There are _____ students in our school.
A. one thousand and three hundred and fifty-one B. one thousand three hundred and fifty-one
C. one thousand three hundred fifty-one
D. one thousand three hundred fifty one
A
B
( ) 3. The Palace Museum is a famous place in Beijing.
Every day, _____ people visit it.
A. thousand B. thousand of
C. thousands D. thousands of
( ) 4. There are _____ students in my class and I’m
_______ tallest student.
A. fifty; three B. fiftieth; the third
C. fifty; the third D. fifty; third
D
C
二、閱讀下面的句子，根據(jù)所給提示，用合適的單詞填空。
1. The city wall in Nanjing has a history of more than ______________(700) years.
2. The height of the CN Tower is about
___________________________________(1,815) feet.
3. He is ___________(第十二) student to get to the top of the hill.
4. China has an area of more than ____________________
__________(9,600,000) square kilometres.
5. Nearly __________(五百萬) of fans would like to go to Qatar to watch the _____________(第二十二) World Cup.
seven hundred
one thousand eight hundred and fifteen
the twelfth
9 million, six hundred
thousand
twenty-second
five million
Finish the grammar exercise.
Optional: Make a report about a place of interest in Guangzhou. Use cardinal numbers and ordinal numbers properly.

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