牛津深圳版八年级上册 Module 1 Unit 2 Numbers 课件 (共20张PPT)

(共20张PPT)
Getting Ready
Period 1
Module 1 Amazing things
Unit
2
Numbers
1. How many students are there in our class
43
2. What’s the date today
3.What time is it now
September 18.
It’s 4:05
Brainstorm
2
What do we use numbers for
We use numbers to …
count
calculate
time
height
date
weight
….etc.
numbers in your daily life
Today is_____ It is_____°C. It is_________.
September.
1st
23
They are_____ It is_____ It is___________ yuan.
grams. centimetres long
10:10
526
17.8
3.90
Ordinal:序数词
Cardinal:基数词
B Look at the pictures, the title of the story and the first sentences of
paragraphs 1 and 2 on page 19. Then circle the correct answers.
Before you read
3
4
While you read
Skim the story and divide it into 3 parts.
realized
The beginning
A long time ago, there was a king in India. The king’s favourite game was chess.
One day, a wise old man came to the palace and the king challenged him to a game. The king promised the old man, “You can have any prize if you win the game.”
Read Paragraphs 1 and 2.
1. The story happened in ancient Italy.
2. The old man challenged the king to a chess game
in the king’s palace.
3. The king promised to give the old man anything
he wanted if the old man won the game.
Decide whether the following statements are true or false.
The old man said, “If I win the game, I’d like one grain of rice for the first square of the chessboard, two for the second, four for the third, and then double the amount for each of the rest of the squares.”
“Is that all ” asked the king. “Wouldn’t you like gold or silver instead ”
“No, just rice,” replied the old man.
Read Paragraphs 3, 4 and 5.
The middle
Match the sentences with the characters.
The king and the old man played the game for a long time. Finally, the old man won. So the king ordered his men to collect a bag of rice. He put one grain on the first square, two on the second, and so on. The king quickly realized the problem—even with all the rice in the country, he would still not have enough rice to put on all the squares!
The ending
Read Paragraph 6.
Put the following sentences into the correct order.
After you read
A long time ago, there was a king in India. The king’s favourite game was chess.
One day, a wise old man came to the palace and the king challenged him to a game. The king promised the old man, “You can have any prize if you win the game.”
The old man said, “If I win the game, I’d like one grain of rice for the first square of the chessboard, two for the second, four for the third, and then double the amount for each of the rest of the squares.”
5
How many grains of rice should the king put on the last square
I’d like one grain of rice for the first square of the chessboard, two for the second, four for the third, and then double the amount for each of the rest of the squares.”
“Is that all ” asked the king. “Wouldn’t you like gold or silver instead ”
“No, just rice,” replied the old man.
The king and the old man played the game for a long time. Finally, the old man won. So the king ordered his men to collect a bag of rice. He put one grain on the first square, two on the second, and so on. The king quickly realized the problem—even with all the rice in the country, he would still not have enough rice to put on all the squares!
How many grains of rice should the king put on the last square
第二格=2的1次方=2粒米 第三格=2的2次方=4粒米 第四格=2的3次方=8粒米 …… 棋盘共64格
Discussion
2^63 = 9,223,372,036,854,775,808 grains of rice
Act and show