内容正文:
2
4
Amazing things
Numbers
More practice
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1. When was Nanpu Bridge built? How long did it take to finish the bridge?
a. in 1982; about 13 years b. in 1991; about 3 years
2. What was the population of China in 1949?
a. about 300,000,000. b. about 400,000,000
3. How big is Tian'anmen Square?
a. 400,000 m2 b. 40,000 m2
4. What are the average temperatures in winter and summer in Shanghai?
a. about 0℃;about 26℃ b. about 5℃;about 30℃
Before you read
A0 Have a quiz
✓
✓
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The average of 3, 5 and 10 is 6.
/ˈævərɪdʒ/
How do we know these numbers?
Venn diagram
What can help make conducting survey easier?
Before you read
A1 Think, discuss and learn
Charts, graphs and Diagrams
What kinds of charts do you know?
Bar chart
Pie chart
Line Graph
系列 1 类别1 类别2 类别3 类别4 4.3 2.5 3.5 4.5 系列 2 类别1 类别2 类别3 类别4 2.4 4.4 1.8 2.8 系列 3 类别1 类别2 类别3 类别4 2 2 3 5
系列 1 类别 1 类别 2 类别 3 类别 4 4.3 2.5 3.5 4.5 系列 2 类别 1 类别 2 类别 3 类别 4 2.4 4.4 1.8 2.8 系列 3 类别 1 类别 2 类别 3 类别 4 2 2 3 5
系列 1 类别 1 类别 2 类别 3 类别 4 4.3 2.5 3.5 4.5 系列 2 类别 1 类别 2 类别 3 类别 4 2.4 4.4 1.8 2.8 系列 3 类别 1 类别 2 类别 3 类别 4 2 2 3 5
What are the steps to conduct a survey?
Before you read
A1 Think, discuss and learn
Step 1: decide who to ask
Step 2: designs the question(s)
Step 3: ask the question(s)
Step 4: tally (统计) the result(s)
Step 5: show the result(s) of the survey
?
Survey
Report
charts/graphs/
diagrams/tables
introduction
conclusion
Before you read
A2 Look and Describe the pie chart.
The pie chart shows _______________________________
There are _______________________________
_______________________________
_______________________________
_______________________________
_______________________________
_______________________________
Students' favourite subjects
Total: 40 students
__________________________________________________________
So we can see Math is___________________________, while
__________________________________________________________
introduction
conclusion
the favourite subject