Listening and vocabulary优质课教案设计

A lesson in a lab Listening and Vocabulary

四川省成都市彭州市敖平中学

王永英

Do you have such an experience to do an experiment with the help of a teacher? You will hear a conversation in which a teacher helps a student do an experiment. Can you predict the result according to the aim? Listen to the conversation and complete the description of the scientific experiment. Aim: to find out if there’s a change in weight when magnesium burns in air.

Apparatus: Magnesium, Bunsen burner, a balance, a crucible. Method: First, put the magnesium in the crucible. Then put the crucible on the balance and weigh it. Next, heat the magnesium. Light the Bunsen burner and hold the crucible over it. Finally, weigh the magnesium again. Result: It weighs a little more than before. Conclusion: There is a change in weight when magnesium burns in air. 英语中基数词、序数词、分数、小数和百分数的读法

Read the numbers in English. 2 two

21 twenty-one

201 two hundred and one

2,001 two thousand and one

20,001 twenty thousand and one

200,001 two hundred thousand and one

2,000,001 two million and one 71﹪

seventy-one percent

29﹪

twenty-nine percent

9,600,000

nine million, six hundred thousand 1,951,000,000

one billion, nine hundred and

1/10 one-tenth

1/4

a quarter (one-fourth)

1.4 one point four

306.7three hundred and six point seven 1. 基数词的读法：

先说“几十”，

再说“几”。如：

23—

twenty-three

89—eighty-nine B. 先说“几百”，

再加and,再加末两位数（或末位数）。如：

223—two hundred and twenty-three 416—four hundred and sixteen 809—eight hundred and nine C. 1,000以上的数先从后向前数，每三位数加一“,”（千分位）；第一个“,”号前为thousand; 第二个“,”号前为million; 第三个“,”号前为billion。如：

1,001—

4,000—

9,743—

174,301—

750,000,000—

one thousand and one

four thousand

nine thousand, seven hundred and forty-three

a (one) hundred and seventy-four thousand, three hundred and one seven hundred and fifty million 2. 序数词的读法

序数词一般以与之相应的基数词加词尾-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。如：

one —

two —

three—

five—

eight —

nine—

twelve—

First

second

third

fifth

eighth

ninth

twelfth 1/5

1/7

4/7

7/10

97/111 one fifth

one seventh

four sevenths

seven tenths

ninety-seven one hundred and elevenths

3. 分数的读法

分子用基数词,分母用序数词;分子大于1时, 分母的序数词后需要加s。

4. 小数的读法

小数点读作

point 0.5

0.76

1.23

23.45 point five

point seven six

one point two three

twenty-three point four five 5. 百分数的读法

27% — 45% —86% —twenty-seven percent forty-five percent

eighty-six percent 1,000

2,000

12,000

112,000

796,000 one thousand

two thousand

twelve thousand

one hundred and twelve thousand seven hundred and ninety six thousand

Can you say the following in English correctly? 988,766,688 nine hundred and eighty-eight million, seven hundred and sixty-six thousand, six hundred and eighty-eight 987,654,321 nine hundred and eighty-seven million, six hundred and fifty-four thousand, three hundred and twenty-one Now let’s say: 2/5

5/8

9/10

3/8

5/6.

two-fifths

five-eighths

nine-tenths

three-eighths

five-sixths Read these questions aloud and say the answers. What is ½ 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 ¾ of 1,000,500,000?

Seven hundred, fifty million, three hundred, seventy-five thousand.

6. What is 10% of 800,000,000?

Eighty million.