Smart Charts Class 4 Notes CBSE Maths Chapter 14 [Free PDF Download]

Smart Charts

• A smart chart is a collection of information. This information is collected by observations and measurements.

• Smart charts can involve tables, bar graphs (both horizontal and vertical) etc.

• Smart charts are used to make data more presentable, visually appealing and easy and quick to understand.

• Example: The following table shows the number of students who want to go to a picnic and those who don’t want to go to a picnic
  
  

Tables

• Tables are made up of cells that are arranged in rows and columns. 

• There are no restrictions on the number of rows and columns a table can have.

• Columns involve vertical grouping whereas rows involve horizontal grouping. 
  
  

A smart chart showing columns, rows and cells

• They can be used to create lists, compare data, align and group data, and so on.

• They are used to organise data that is too complicated to be adequately described in the text, allowing the reader to see the results quickly.

• Example: The following table shows the number of kids and their respective no of hours of TV.

• Table helps us in easily analysing information and getting results from it.

• Example: We can easily tell from the above table that four kids watch TV for one hour.
  
  

Solved Example 1. From the above table can you tell the number of kids who watch TV for more than four hours?

Ans: Clearly, from row one we can see that two kids watch TV for more than four hours.

Extracting Data From the Table

Sometimes we are not given exact numbers directly in the table and we need to extract information from it. 

Let's understand this through an example.

Solved Example 1. Nikki made a list of her close friends and the video games they like and don’t like.

Observe the above data and answer the following questions.

Q. Which video game is liked by most of Nikki’s friends?

Ans. Observe that Super Mario appears two times in the second column. Rest all games appear only once. Hence, Super Mario is the most liked game by Nikki’s friends.

Q. Which video game is not liked by most of Nikki's friends?

Ans. Observe that Temple Run appears two times in the third column. Rest all games appear only once. Hence, Temple Run is not liked by most of  Nikki’s friends.

Practical Applications of Table

• Daily attendance record is maintained in a table.

• School mark sheets are in form of a table.

• Your school exam timetable/ daily class timetable also uses a table.

How to Make a Table?

Step 1: Collect data for the table.

Step 2: Select the method of grouping.

Step 3: Draw the table.

Let’s understand this with the help of an example.

Solved Example 1. In a class, 25 kids love to drink milk, 10 kids love to drink coffee and 5 kids love to drink tea. Represent data in a table.

Hint: Make two columns, one for the number of kids and another for the drink they like.

Ans: 

Step 1: Data is already collected and given in the question.

Step 2: We will make two columns one for the number of kids and another for the drink they like.

Step 3: Let’s draw the table:

What is a Chart?

• A chart is a graphical representation of data.

• Data can be represented by symbols, such as bars in a bar chart.

• The length of bars in a bar chart is proportional to their values.

• Bar charts can be horizontal or vertical. (if bars are vertical we call it a vertical bar chart and if bars are horizontal then we call it a horizontal bar chart)

Drawing a Chart

Step 1: Collect the data.

Step 2: Choose the type of chart. 

Step 3: Choose an axis.

Step 4: Draw the chart.

Let’s understand this through an example:

• Given that 5 kids like Oranges, 2 kids like Apples, 6 kids like Bananas, and 3 kids like Kiwi. 

• Let’s make a vertical bar chart for this.

• Let the horizontal axis represent the type of fruit and the vertical axis represent the number of kids.

• We get the following graph.
  
  

A Smart chart with a horizontal axis representing the type of fruit and a vertical axis representing the number of kids

Horizontal Bar Chart

• Sometimes instead of making vertical bars we make horizontal bars also. Such a graph we call a Horizontal bar graph.

• Example following bar graph shows the number of frog homes present in trees, gardens and ponds.

  
  
  

A smart chart showing the number of frog homes present in trees, gardens and ponds

Reading the Chart

We can read data by observing the length of bars.

In the above graph, seven frogs live in the garden as seven green boxes are present.

Similarly, we can find the number of frogs living in the tree and pond as four and five respectively.

Practice Questions:

Q1. The following bar chart shows the number of children who like a particular fruit. Can you tell which fruit is liked most by children and which is liked least by children?

A bar chart with particular fruit liked by the number of children
 

Answers. 

Ans: Most liked fruit: Banana

Least liked fruit: Pineapple

Q 2. The following table shows the number of children who liked a particular sport. Can you tell how many children like Football? Also, tell whether it is the most liked sport or not.

Ans: 10 children play football. No, it’s not the most liked sport.

Importance of CBSE Class 4 Maths Chapter 14 Smart Charts Revision Notes

The importance of the revision notes of this chapter can be understood from the list mentioned below.

• The introduction of statistics at the basic level shows how to extract information from a given text. Students will learn what is smart chart and how to formulate one from scratch.

• They will understand the meaning of rows and columns. Previously, they have input data in the tabs that have already been designed. Now, they will figure out how to formulate a chart from scratch using the specific information provided.

• They will learn to follow the questions and then proceed to make a smart chart.

• Identifying a particular type of information from the text such as objects, colours, features, time, events, etc., will become a strong point for Class 4 students.

• Handling multiple rows and columns to solve a sum will become a lot easier by referring to these revision notes. Students will be able to make charts related to flowers and different colours and give the correct information according to the questions asked.

Benefits of Smart Charts Class 4 Worksheets and Revision Notes

• Our subject experts understand the prime objective of this chapter. Its inclusion in the syllabus has led to the foundation concept of creating charts among students. It will be useful for students in the future for understanding statistical methods and principles of probability.

• Answering questions like what do we see on the road, especially information, will become easier when our subject experts explain how to extract information from a provided text.

• These revision notes will also help you to resolve your doubts and give you proper ideas and methods to solve the Maths exercise for Class 4 Chapter 14.

• You can also solve the worksheets from this chapter on your own.  The solutions are also provided for checking the problem-solving methods adopted by the subject experts.

Make Smart Charts Easier to Prepare

Math Magic Class 4 Chapter 14 has never been easier to study. Comprehend the topics and concepts explained in this chapter using the revision notes and worksheets. Practice and prepare this chapter by referring to the revision notes before an exam and score well.

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