CBSE Class 4 Mathematics Chapter 14: Smart Charts NCERT Solutions

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NCERT Solutions PDF Class 4 PDF

This chapter, 'Smart Charts' for CBSE Class 4 Mathematics, focuses on understanding and interpreting data presented in various chart formats. Students will learn to collect information, organize it, and represent it visually using simple charts. The exercises involve reading data from charts, answering questions based on the data, and sometimes creating their own charts. Key concepts include tally marks, pictographs, and bar graphs, which help in making sense of numerical information. These NCERT Solutions provide step-by-step explanations to help students grasp these concepts effectively, aiding in their exam preparation and developing data analysis skills.

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Quick info

BoardCBSE
ClassClass 4
SubjectMathematics
Session2026
LanguageEnglish
TypeNCERT Solutions
ChapterChapter 14

Chapter summary

Chapter 14, 'Smart Charts,' for Class 4 Mathematics NCERT Solutions, introduces students to the concept of data representation and interpretation. It covers how to collect, organize, and present information using simple charts and graphs. The solutions focus on understanding data presented in tables and charts, answering questions based on this data, and performing simple calculations related to it. This chapter builds foundational skills in data handling and visual representation, crucial for future mathematical learning.

Learning outcomes

  • Understand the concept of data collection and representation.
  • Interpret information presented in simple charts and tables.
  • Create basic charts to represent given data.
  • Solve problems involving data analysis from charts.
  • Calculate time spent on activities based on daily records.

Topics covered

Paper topics

  • Data Collection
  • Data Organization
  • Tally Marks
  • Pictographs
  • Bar Graphs
  • Interpreting Charts
  • Time Calculation
  • Weekly Time
  • Monthly Time

Important topics

  • Interpreting data from charts
  • Calculating time spent over different periods
  • Understanding frequency in data
  • Representing data visually

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Questions and Solutions

Question 1

1. (a) Note the time you spend in front of a TV or radio every day. Do this for one week. The time spent in a week is _____ hours. So in a month you spend about 30 \times \text{ = hours}. (b) Find out from your friends the time they spend in a week.

How many hours they watch TV or listen to the radio (in a week) Number of Children

More than 6 hours Six hours Five hours Four hours Three hours Two hours One hour Zero hour (do not watch)

Solution:

This question requires personal data collection and then interpreting a given data set.

Part (a): Personal Time Tracking

  1. First, observe and record the time you spend watching TV or listening to the radio each day for a week. For example, let's assume you spend 1 hour each day.
  2. To find the total time spent in a week, multiply the daily time by 7. If you spend 1 hour daily, then in a week you spend 7 \times 1 = 7 hours.
  3. To estimate the time spent in a month (assuming 30 days), multiply the daily time by 30. So, 30 \times 1 = 30 hours.

Part (b): Interpreting a Data Table

The table below shows how many children spend a certain amount of time watching TV or listening to the radio in a week:

Hours watched per week Number of Children
More than 6 hours 5
Six hours 7
Five hours 4
Four hours 10
Three hours 12
Two hours 15
One hour 8
Zero hour (do not watch) (Implied from total children, not explicitly given)

From this table, we can see that the most common time spent by children is 'Two hours' a week, with 15 children falling into this category. The least common time spent watching TV for more than zero hours is 'Five hours', with only 4 children.

Regarding the question 'can watch for 24 hours Is it good or ( for me)':

Watching TV or listening to the radio for 24 hours a day is not good for anyone. It is important to balance screen time with other activities like playing, studying, and sleeping for overall health and development.

Common mistakes

  • Misinterpreting chart scales or labels.
  • Errors in counting or tallying data.
  • Incorrectly calculating totals or differences from chart data.
  • Confusing time units (days, weeks, months).

Revision tips

  • Practice reading all types of charts presented in the chapter.
  • Ensure you understand how to convert daily time spent into weekly and monthly totals.
  • Pay attention to the labels and units on each axis of a chart.
  • Try creating your own simple charts for everyday data, like favorite colors or fruits.

Practice MCQs

Q1. If a child spends 2 hours watching TV daily, how many hours do they spend in a week?

Q2. In a survey, 10 children watch TV for four hours a week. What does this represent?

Q3. If a month has 30 days, and a person spends 1 hour on TV daily, how many hours are spent in a month?

Q4. Which activity is most popular among children who watch TV for 'Three hours' a week, based on the provided data?

Frequently asked questions

What is the main goal of Chapter 14, 'Smart Charts'?

The main goal is to teach students how to collect, organize, interpret, and represent data using simple charts and tables, making them understand information visually.

How do these NCERT Solutions help Class 4 students?

These solutions provide clear, step-by-step explanations for each question, helping students understand concepts like data interpretation and time calculations related to charts, aiding their exam preparation.

What kind of data is used in this chapter?

The chapter uses everyday data, such as the time spent watching TV or listening to the radio, to make learning relatable and practical for students.

Are there any specific types of charts covered in this chapter?

While the source text focuses on interpreting data presented in a tabular format and simple bar-like representations, the chapter generally introduces the idea of smart charts which can include pictographs and bar graphs.

How can I use these solutions for revision?

You can use these solutions to review the methods for interpreting data, practice calculations for time spent, and ensure you understand how to answer questions based on visual data representations.

Important links

Content reviewed by the NCERT Help team. Editorial Team and update policy

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