第八单元

Unit eight

I exercise my health - average

我锻炼我健康——平均数

Lesson One

第一课

Number 7 and No. 8 players scored in the group matches

7号、8号运动员在小组赛中得分情况统计表

What questions can you ask?

你能提出什么问题？

1. Who can shoot better?

1.谁的投篮水平高？

Take a look at how they scored in the group stages.

看一看他们在小组赛中的得分情况。

They should be compared to their points per game.

应该比一比他们每场的得分。

I draw a square to represent one point, first the two players score into a bar chart, and then move in the map to know.

我图一个方格表示一分，先把两个运动员的得分图成条形图，再在图里移一移就知道了。

Player No. 7 averaged 11 points per game

7号运动员平均每场得11分。

Player No. 8 averaged 10 points per game.

8号运动员平均每场得10分。

I can compare it like this

我可以这样比

Average points per game for player No. 7:       Average points per game for player No. 8:

7号运动员平均每场得分：                        8号运动员平均每场得分：

（9+11+13）÷3                                  （7+13+12+8）÷4

=33÷3                                          =40÷4

=11（分）                                       =10（分）

10 points is player number 8's score in which game?

10分是8号运动员哪一场的得分？

10 is the average of 7,13,12, and 8.

10是7，13，12 ，8这4个数的平均数。

11 is the average of 9,11, and 13.

11是9，11 ，13这三个数的平均数。

An average is a good indicator of the overall level of a set of data.

平均数能较好地反映一组数据的整体水平。

Do you calculate their average performance in sit-ups?

你会计算他们做仰卧起坐的平均成绩吗？

Let me do it this way

我这样计算。

20+35+35+24+35+31=180次。

Average score 180÷6=30 times

平均成绩180÷6=30（次）

I calculate it like this:

我这样计算：

35×3+20+24+31

=105+20+24+31

=180（次）

Average score: 180÷6=30 (times)

平均成绩：180÷6=30（次）

Lesson Two

第二课

Standing Long Jump Performance of Team 1 (CM)

第一小队立定跳远成绩（cm）:

150  130  155  155  140

155  135  118  120  135

140  155  160  180  155

165  140  120  155  195

Team 2 standing long jump (cm)

第二小队立定跳远成绩 （cm）:

170  150  120  130  165

135  155  110  115  140

135  130  147  145  160

130  125  145  125  133

What questions can you ask?

你能提出什么问题？

Can you straighten up the results of Team 1's standing long jump?

1.你能将第一小队立定跳远的成绩整理一下吗？

The long jump results are divided into several sections for statistics

将跳远成绩分成几段进行统计。

I found that the first team had the most people in () and the least in ().

我发现第一小队成绩在（）的人数最多，在（）的人数最少。

After sorting out the data in sections, we can see the general situation of the standing long jump performance of the first team more clearly.

将数据分段整理后，能更清楚地看出第一小队立定跳远成绩的大体情况。

Can you straighten up the standing long jump results of Team 2?

2.你能将第二小队立定跳远的成绩整理一下吗？

Let's break it down into segments.

分段统计一下吧。

Which team has the better result?

3.哪个队的成绩好些呢？

By combining the two tables into one, it is clear which team has the better result?

把两个表合并成一个表，能清楚的看出哪个队的成绩好些？

How do you calculate totals and totals? What do you find out from this statistical table?

你是怎样计算合计与总计的？从这张统计表中你发现了什么？

How much do you know about consumption

消费知多少

make a plan

制定方案

How to calculate the monthly consumption of the whole class?

怎样统计全班的月消费情况呢？

Consumption items include food, clothing, education, transportation, entertainment expenses...

消费项目包括饮食，服装，教育，交通，娱乐费用…

Can design the record table and the statistics table, during the investigation to carry on the sorting and the analysis of the data.

可以设计记录表和统计表，调查时对数据进行整理与分析。

First, the monthly consumption of each person is counted, then the summary is made.

先统计每个人的月消费情况，再进行汇总。

Collect Data

收集数据

How much do I need for food a month?

我一个月吃饭需要多少钱？

How much is our monthly study fee, Sir?

老师，我们每月的学习费用是多少？

Communication reflection

交流反思

Some of my spending isn't quite right

我的有些消费不太合理。

It is not easy for Mom and Dad to earn money. We should form the good habit of saving

爸爸和妈妈挣钱不容易，我们要养成节约的好习惯。

By collating and analyzing the data, we know the consumption situation of the whole class

通过对数据进行整理分析，我们知道了全班同学的消费情况。

Statistics are a good way to study a problem.

统计是研究问题的好方法。