小学英语基数词序数词ppt课件26页.pptx

4
one billion
Can you read them ?
billion million thousand
100 2,000 30,000 400,000 5,000,000 60,000,000 700,000,000 8,000,000,000 90,000,000,000 100,000,000,000
language in the USA, Great Britain, Australian,
and Canada. •The Games of the t_w__e_n_t_y_-_n_i_n_t_h_ Olympic in 2008
tenth ninth
ordinal numbers
eighth seventh
fourth fifth sixth
❖ ordinal numbers(序数词 )
一、二、三，特殊记， 加th从4起， 八少“t”，九去“e”， “ve”要用“f”替，(five, twelve) 见“y”变成“i”和“e”，词尾加上 “th”， (twenty,thirty,---ninety) 若是遇到几十几，只变个位就可 以。
数词
LOGO
什么是数词？
• 表示数目多少或顺序多少的词叫数词， 数词分为基数词和序数词。表示数目 多少的数词叫基数词；表示顺序的数 词叫序数词。
基数词
one two
five
three
eight four
seven six
zero one nine eight
seven six
two three four
一千亿
one hundred billion
数十/百/千/百万tens/ hundreds/thousands/ millions of
123 ,456 , 789 , 103
Step1:one hundred and twenty-three billion,
Step2:four hundred and fifty-six million, Step3:seven hundred and eighty-nine thousand,
Can you write their ordinal numbers?
2
12
72
9
19
90
5
8
18
14
40
44
100
101 1000
Practice:
•December is the _t_w_e_l_f_t_h_ month of the year. •Monday is the _s_e__c_o_n_dday of the week. •English is spoken by most people as their _f_i_r_st___
Look and Practice
6,302,876 six million, three hundred and two thousand, eighty hundred and seventy-six
45,690,510,810 forty-five billion ,six hundred and ninety million, five hundred and ten thousand ,eight hundred and ten
hundred
看谁译得快：
一百
one hundred
一千
one thousand
一万
ten thousand
十万
one hundred thousand
一百万
one million
一千 万
ten million
一亿
one hundred million
十亿
one billion
一百亿
ten billion
• 1-10 • one two three four five • six seven eight nine ten
11-19 eleven twelve thirteen forteen fifteen sixteen seventeen eighteen nineteen
Let’s review
wk.baidu.com
What is the largest / smallest 4-digit number?
9831
1389
8 193
Let’s do a practice!
face to face number to number
序数词
•one ---first three---third five---fifth seven---seventh
ten sixty
thirty
forty
seventy
One hundred
eighty
fifty
ninety
twenty
Dragon
• 1-100
Look and Read
100
1
one hundred
1,000
2
one thousand
3 1,000,000 one million
1,000,000,000
nine---ninth
two---second four---fourth six---sixth eight---eighth •ten----tenth
twenty---twentieth forty---fortieth sixty---sixtieth eighty---eightieth
Step4:one hundred and three
Look and Practice
625 six hundred and twenty-five
8,961 eight thousand, nine hundred
and sixty-one 95,680
ninety-five thousand, six hundred and eighty
five
zero one two
nine
three
numbers
eight
four
seven six five
Numbers are widely used.
Hello ， 86861873 ---
Let’s sing a song ！
Title
Number song
Let’s count!
thirty---thirtieth fifty---fiftieth seventy---seventieth ninety---ninetieth
second
first
third
tenth
fourth
ninth eighth
fifth
sixth seventh
second
first
third