U8、New school uniform bar chart 八、新校服一一条形统计图 Lesson One 第一课 Students, to make a new school uniform! 同学们，要做新校服啦! My school uniform size is 150. 我的校服尺码是150。 What is the size of the school uniform for the whole class? 全班同学的校服尺码情况怎样呢? What questions can you ask? 你能提出什么问题? Cooperative exploration 合作探索 What is the size of the school uniform for the whole class? 全班同学的校服尺码情况怎样呢? To solve this problem, we need to investigate and collect the school uniform size of each student. 要解决这个问题，需要调查和收集每个同学的校服尺码。 First divide the group to collect the data. 先分小组来收集数据。 I'll record the data. 我来记录数据。 That's my record. 我这样记录。 Sort out the recorded data. 把记录的数据整理一下。 Statistical table showing the size of the school uniform 全班校服尺码情况统计表 Statistics on the size of the school uniform 全班校服尺码情况统计图 The vertical and horizontal axes each indicate... 纵轴和横轴各表示...... I can represent the data in the table by applying lattice. 我能用涂格子的方法表示表中的数据。 Such a chart is a bar chart. 这样的统计图是条形统计图。 What information can you get from the chart? 从统计图中你能得到哪些信息? I can see clearly how many people wear different sizes. 我能清楚地看出穿不同尺码的各有多少人。 It can be seen from the picture that the number of people wearing the size is the largest. 从图中可以看出穿 尺码的人数最多。 Think about it: 想一想: How do you collect and organize data in the above statistical activities? (1) 在上面的统计活动中你是如何收集与整理数据的? What is the role of data in solving the above problem? (2) 在解决上面的问题中，数据起着什么作用?
Lesson two 第二课
What is the size of your school uniform? 你们班的校服尺码情况怎么样呢? Our school uniform... 我们班的校服...... What is the size of the school uniform for the whole grade? 全年级同学的校服尺码情况怎样呢? What more questions can you ask? 你还能提出什么问题? Cooperative exploration 合作探索 What is the size of the school uniform for the whole grade? 全年级同学的校服尺码情况怎样呢? We need to know the size of the school uniform in each class. 我们要了解各班的校服尺码情况。 We unified the data collected from each class. 我们把收集到的各班的数据统一整理一下。 One grid means one person, what if the grid is not enough? 1格表示1人，格子不够怎么办? You can use one grid for two or three people... 可以用1格表示2人或3人..... How many people are more appropriate to use 1 lattice? 用1格表示几人比较合适呢? What do you find from this bar chart? 从这个条形统计图中你发现了什么? I found that the students wearing ____ sizes are more and the ____ sizes are less. 我发现穿____尺码的同学比较多，穿____尺码的比较少。
Wisdom Square 智慧广场 There is a 50-meter long path in front of the school, planning to plant trees on the side of the path, every 5 meters. If both ends are planted, how many saplings are needed? One end is not planted? Not at both ends? 学校门前有一条长50米的小路，计划在小路一旁植树，每5米栽一棵。如果两端都栽，需要多少棵树苗?一端不栽呢?两端都不栽呢? Cooperative exploration 合作探索 First study the situation of both ends. 先研究两端都栽的情况。 I tried drawing. 我用画图的方法来试一试。 Divide into 10 sections on average and plant 11 trees. 平均分成10段，要栽11棵树。 I use my fingers to represent the tree, and the gap between the two fingers to represent the spacing of the tree. I find that there are four spacing between the five trees, and the number of intervals is 1=. 我用手指代表树，用两指间的空隙代表树间距，发现: 5棵树之间有4个间距，间隔数+1=棵数。 Fifty divided by five plus one equals eleven 50÷5+1=11 (棵) Then study the situation that one end does not fall. 再研究一端不栽的情况。 I'll try it by drawing lines. 我用画线段图的方法来试一试。 Hold the thumb and find that the interval is =. 握住大拇指，发现:间隔数=棵数。 Fifty divided by five equals ten 50÷5=10(棵) What about not planting at both ends? 两端都不栽的情况怎样呢? I'll try it by drawing lines. 我用画线段图的方法来试一试。 Hold thumb and small finger, find: interval number-1= number. 握住大拇指和小指，发现:间隔数-1=棵数。 Fifty divided by five minus one nine 50÷5-1=9 (棵) |
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