Unit 2 Numbers Grammar 课件(共24张PPT)

(共24张PPT)
英语（牛津版）
八年级 上册
Unit 2
Numbers
English
Grammar
请用英语朗读下面的数字。
1. (1) 0.03 (2) 1.75 (3) 23.48
2. (1) 4% (2) 94%
3. (1) 20 July, 1998 (2) Oct. 1st, 2019
4. (1) 7:15 (2) 9:30 (3) 10:45
5. (1) 639 148 (2) 945 8204 (3) 7339 2318
3 three 13 thirteen 20 twenty 70 seventy
11 eleven 15 fifteen 30 thirty 82 eight-two
12 twelve 18 eighteen 50 fifty 98 ninety-eight
100 one hundred
200 two hundred
375 three hundred and seventy-five
A Cardinal and ordinal numbers
We use cardinal numbers to count things.
1,000 one thousand
4,189 four thousand one hundred and eighty-nine
15,362 fifteen thousand three hundred and sixty-two
100,000 one hundred thounsand
285,643 two hundred and eight-five thousand six
hundred and forty-three
1,000,000 one million
3,367,982 three million three hundred and sixty-seven
thousand nine hundred and eighty-two
In the cardinal numbers, we do not add-s to hundred, __________and__________.
With large numbers, we put _________ between hundred and ten.
Work out the rule
thousand
million
and
数词概述
★ 数词的定义
表示数目多少或顺序先后的词叫数词。
★ 数词的分类：
数词分为基数词和序数词。
★ 基数词作用：表示数目或数量多少。
★ 序数词作用：表示顺序和等级。
★ 数词在句中的成分：
可作主语、宾语、表语、定语和同位语等。
两位数以内的
基数词
几十几的基数词
三位数的基数词
千，百万，亿
1-12
12-19
20-90整十数
基数词
★ 1-12 的基数词：
one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve.
★ 13-19 的基数词：以-teen结尾。
thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen.
★ 20-90的整十数基数词的表示方法：
均以 -ty 结尾.
twenty, thirty, forty, fifty, sixty, seventy,
eighty, ninety.
★ 几十几的基数词：
十位数与个位数之间要用连字符“-”连接.
例如：85— eighty-five 28—twenty-eight
★ 三位数的基数词：
在百位和十位（若无十位则和个位）之间用and连接。
如：148—one hundred and forty-eight,
206—two hundred and six
★ 多位数的表示方法：
从个位开始三个化为一级，分为个级，千级，百万级和十亿级，读的时候从高位开始按照三位数的读法读出再加上表示级别的词。如:
31,415,923
读作：thirty-one million four hundred and fifteen
thousand nine hundred and twenty-three
【Things to remember】
hundred(百）thousand(千），million(百万），billion（十亿）
前面有数词时后面不加s.
For example:
5000—five thousand 表示不确定的数目时后面加s,再加单词of.
For example:
hundreds of 成百上千
thousands of 成千上万
★ 基数词的写法
1）每三位数算一个单位，三个0为千，六个0为百万，9个0为十亿。
2）长的基数词则要用逗号，从右向左三位三位地分开。
写出下面数字：
1. three thousand eight hundred and sixty-two
2. . four hundred and eighty-nine thousand, nine
hundred and thirty-two
3,862
489,932
We use ordinal numbers to show the order of things.
1st first 7th seventh 13th thirteenth 19th nineteenth
2nd second 8th eighth 14th fourteenth 20th twentieth
3rd third 9th ninth 15th fifteenth 21st twenty-first
4th fourth 10th tenth 16th sixteenth 33rd thirty-third
5th fifth 11th eleventh 17th seventeenth 40th fortieth
6th sixth 12th twelfth 18th eighteenth 100th hundredth
Work out the rule
We form most ordinal numbers by adding ________to the cardinal numbers. There are exceptions, like first, second and third.
-th
The students are standing in a line. They each have a number (from 1 to 28). Fill in the blanks with cardinal numbers on the left and ordinal numbers on the right.
first
2
third
fourth
twelfth
19
twenty-third
twenty-eighth
add … and …
subtract … from …
multiply … by…
divide … by …
B Instructions about numbers
Add 3 and 9. (3+9)
Subtract 3 from 9. (9-3)
Multiply 3 by 9. (3x9)
Divide 9 by 3. (9÷3)
3 plus 9 equals/is12. (3+9=12)
9 minus 3 equals/is 6. (9-3=6 )
3 multiplied by 9 equals/is 27. (3x9=27)
9 divided by 3 equals/is 3. (9÷3=3)
Things to remember
Plus and minus are prepositions.
Read the statements aloud.
2+10 = 12
10-2 = 8
2 × 10 = 20
10÷2 = 5
2 plus 10 equals/is 12.
10 minus 2 equals/is 8.
2 multiplied by 10 equals/is 20.
10 divided by 2 equals/is 5.
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
In pairs, complete the sentences like those in Table I and Table II.
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
1, We have learned how to use cardinal and ordinal numbers.
2, We have learned how to give instructions about numbers.
1（2019，山东滨州卷）—Which month of the year do you like best
—July, the _________ month, because summer vacation begin in this month.
seven B. six C. seventh D. sixth
2（2019，广东卷) We are proud of our country. The year 2019 is her ____ birthday.
A. seventy B. the seventy C. the seventieth D. seventieth
一、选择填空
（2018·广东中考）
3 Please turn to page ______ and take a look at the picture on it.
A. the eightieth B. eightieth C. eighties D. eighty
（2018·重庆中考）
4,Meimei is going to be an older sister. Her parents are planning to have their _______ child.
A. one B. two C. first D. second
（2017·滨州中考）
5.— What do you think of the environment here
— Wonderful! ______ of the land ______ covered with trees and grass．
A．Two fifths; is B．Two fifth; is
C．Two fifths; are D．Two fifth; are
二、根据句意，填入适当的数词
Thursday is the ______ day of a week in the West.
2. Autumn is the ______ season of a year.
3. Christmas is on December the __________ each year.
4. August is the _________ month in a year.
5. June the ______ is Children’s Day.
fifth
third
twenty-fifth
eighth
first
三、用括号内所给单词的正确形式填空。
1. This is his __________(thirty) novel.
2. This happened at the beginning of the __________(twenty-one) century.
3. Mother’s Day is on the __________ (two) Sunday in May.
4. Although he got the _______ (four) place in the competition, that was good enough for him.
5. Tomorrow is my grandmother’s __________ (eighty-nine) birthday. We will have a big party for her.
thirtieth
twenty-first
second
fourth
eighty-ninth