Unit 4 Inventions grammar 课件(共19张PPT) 牛津上海版英语八年级上册

(共19张PPT)
STUDY
Module 2 Unit 4
Numbers
Grammar：Cardinal and ordinal numbers & Decimals and fractions
odd numbers
even numbers
/ d/
/ i vn/
11, 13, 15, 17, 19
12, 14, 16, 18, 20
11, 12, 13, 14, 15, 16, 17, 18, 19, 20
Presentation
Talk about the picture.
1
strange or unusual
10 11 12 13 14
15 16 17 18 19
ten
eleven
twelve
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteen
20 30 40 50
twenty
thirty
forty
fifty
60 70 80 90
sixty
seventy
eighty
ninety
When we say fourteen, we stress the second syllable.
When we say forty, we stress the first syllable.
Say the numbers.
28 32 44 59
twenty-eight
thirty-two
forty-four
fifty-nine
63 75 89 91
sixty-three
seventy-five
eighty-nine
ninety-one
When we write a two-word number, we add a “-”.
Presentation
Say the numbers.
3
100
200
1,000
10,000
200,000
1,000,000
20,000,000
300,000,000
one hundred
two hundred
one thousand
ten thousand
two hundred thousand
one million
twenty million
three hundred million
thousand
million
Say big numbers.
Among the cardinal numbers, hundred, thousand and million have no “s”.
2,500
13,900,000
4
one million two hundred and eighty-four thousand three hundred and seventy-five
375
three hundred and seventy-five
We pause after million and thousand.
284,375
two hundred and eighty-four thousand three hundred and seventy-five
1,284,375
305
three hundred and five
Presentation
Say the numbers.
5
Listen to the recording and complete the bar chart.
Population Growth in Shanghai
Year
Population
Practice
6
Population Growth in Shanghai
1950
1995
2005
4,301,000
7,823,000
16,763,000
27,137,000
Practice
Check the answers.
7
Top three biggest cities by population in China
Chongqing
First
Second
Third
Shanghai
Beijing
Ordinal numbers
Learn the language.
We use ordinal numbers to show the order or position of something.
4 5 9 12
20 30 40 90
fourth
fifth
ninth
twelfth
twentieth
thirtieth
fortieth
ninetieth
100
21 33 45 69
one hundredth
twenty-first
thirty-third
forty-fifth
sixty-ninth
ty + tieth
Say the numbers.
Presentation
Most ordinal numbers are made by adding “-th” to the cardinal numbers, except for one, two and three.
9
Tell the dates.
Betty — 2nd January
S1: When is Betty’s birthday
S2: It is on the second of January.
David — 30th September
Cindy — 16th June
Alan — 3rd March
on the thirtieth of September
on the sixteenth of June
on the third of March
We use ordinal numbers to tell the dates.
Practice
10
Learn the language.
Fractions
1
6
A fraction is:
a part of a whole
a part of a collection
Presentation
11
one
two
third
third
s
one third
two thirds
numerator
denominator
If a numerator is over 1, we need to add “s” after the denominator.
Ordinal numbers
Cardinal numbers
Presentation
12
Learn the language.
Note these special fractions.
a/one half
a/one quarter
three quarters
1
4
3
4
Presentation
13
Learn the language.
Say the mixed fraction.
two
one fifth
and
Presentation
14
2
Say the fractions.
one eighth
seven twelfths
five sixteenths
three and a half
seven and three quarters
1
8
7
12
5
16
1
3
4
3
7
Learn the language.
Percentages
50%
25%
percent/per cent
fifty percent
twenty-five percent
Don’t add “s” after percent.
Presentation
16
Decimals
point
zero
six
fifty-nine
two
three
fifty-nine point twenty-three
$12.5
fifty-nine point two three
We say each number separately after a decimal point.
Presentation
Learn the language.
17
Say the decimals.
0.3
zero point three
0.368
zero point three six eight
7.145
seven point one four five
36.36
thirty-six point three six
Pay attention to the location of the decimal point.
Practice