CBSE Class 3 Mathematics Chapter 7: Time Goes On NCERT Solutions
CBSE Class 3 Mathematics Chapter 7, Time Goes On, introduces young learners to the concept of time through relatable activities. The NCERT Solutions focus on helping students understand and categorize tasks based on how long they take – whether it's minutes, hours, or days. Through engaging examples, children will explore daily routines like brushing teeth or eating a meal, and compare them with longer durations like a banana ripening or a sweater being knitted. The chapter also touches upon activities that span months, such as growing crops or preparing for exams. These exercises are designed to build an intuitive sense of time measurement, a fundamental skill for everyday life and future mathematical learning. The solutions encourage observation, estimation, and critical thinking, making learning about time both practical and enjoyable for exam preparation.
Quick info
| Board | CBSE |
|---|---|
| Class | Class 3 |
| Subject | Mathematics |
| Session | 2026 |
| Language | English |
| Type | NCERT Solutions |
| Chapter | Chapter 7 |
Chapter summary
Chapter 7, 'Time Goes On,' for Class 3 Mathematics NCERT Solutions, focuses on understanding and estimating time durations. It presents exercises that require students to categorize activities into those taking minutes, hours, or days, and even months. The chapter emphasizes practical observation and comparison of time taken for different tasks, helping students develop a sense of time measurement through relatable examples.
Learning outcomes
- Understand that different activities take different amounts of time.
- Categorize activities based on whether they take minutes, hours, or days.
- Estimate the time duration for common daily tasks.
- Compare the speed of different processes.
- Develop an intuitive sense of time measurement.
Topics covered
Paper topics
- Understanding Time
- Estimating Time Durations
- Activities taking Minutes
- Activities taking Hours
- Activities taking Days
- Activities taking Months
- Comparing Time
- Measurement of Time
Important topics
- Categorizing activities by time duration (minutes, hours, days)
- Estimating time for daily tasks
- Comparing durations of different activities
- Understanding longer time scales (months)
PDF preview
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Questions and Solutions
Question 1
Takes minutes Takes hours Takes days
a bath to stitch a shirt to knit a sweater
to boil milk to set curd to weave a sari
a school day for a banana to become ripe
This question encourages students to observe the world around them and think about how long different activities take. Here is a possible way to complete the table, with some additions:
Takes minutes
- A bath
- To boil milk
- To prepare tea
- To fill a bucket of water
- Assembly in school
- To switch on the computer
- To boil an egg
- To brush teeth
- To eat lunch
Takes hours
- To stitch a shirt
- To set curd
- A school day
- To clean the house
- Sunset and sunrise (this is a process that happens over hours)
- To learn to drive a car (initial learning)
- To play (a longer session)
Takes days
- To knit a sweater
- To weave a sari
- For a banana to become ripe
- To do holiday homework (depending on the amount)
- An outstation trip (can take multiple days)
It's important to remember that the time taken can vary. For example, boiling milk might take 5 minutes, while stitching a shirt could take several hours. The goal is to think about the general duration.
Question 1
Takes months to grow wheat (from seed to big plant) to change from summer to winter for a baby to come out of its mother's stomach
This question asks us to think about activities that take a very long time, specifically months. Here are some examples, expanding on the ones provided:
Activities that take months:
- To grow wheat (from seed to a big plant)
- To change from summer to winter (seasons change over months)
- For a baby to come out of its mother's stomach (pregnancy takes about 9 months)
- To get promoted to the next class (school year is usually months long)
- To prepare for exams (major exams often require months of study)
- To grow 1 year old (a full year is 12 months)
- To build a house
- To learn a new language fluently
- To save enough money for a big purchase
These examples help us understand that some processes are very slow and unfold over extended periods.
Common mistakes
- Difficulty in accurately estimating time for less common activities.
- Confusing activities that take minutes with those that take hours.
- Not considering the variability in time taken for similar tasks (e.g., boiling milk can vary).
- Overlooking activities that take longer durations like months.
Revision tips
- Create your own lists of activities and estimate their time in minutes, hours, or days.
- Discuss with friends or family how long different tasks take to get a broader perspective.
- Focus on the comparison aspect: which activity is faster and which is slower?
- Use the provided examples as a starting point and think of even more activities.
Practice MCQs
Q1. Which of the following activities typically takes the longest time?
Explanation: Knitting a sweater is a complex task that requires many hours of work, unlike boiling milk, taking a bath, or boiling an egg, which are completed in minutes.
Q2. Which unit of time would be most appropriate for measuring how long it takes for a banana to become ripe?
Explanation: The ripening process of a banana takes a significant amount of time, typically several days, making 'days' the most suitable unit of measurement.
Q3. If boiling milk takes a few minutes, and stitching a shirt takes a few hours, which activity is faster?
Explanation: Boiling milk takes minutes, while stitching a shirt takes hours. Therefore, boiling milk is the faster activity.
Q4. Which of these activities is likely to take months?
Explanation: Growing a plant from a seed to a big plant is a biological process that takes a considerable amount of time, often spanning several months.
Q5. An assembly in school typically takes:
Explanation: School assemblies are usually short events, lasting for a duration measured in minutes, not hours or days.
Frequently asked questions
What is the main focus of CBSE Class 3 Maths Chapter 7: Time Goes On?
The chapter focuses on helping students understand and estimate the duration of various activities, categorizing them into time spans like minutes, hours, and days.
How do these NCERT Solutions help students?
These solutions provide rewritten, clear explanations for each question, helping students grasp the concepts of time measurement and estimation through practical examples.
Are the answers in the solutions fixed for all students?
For questions asking for personal observation and estimation, the answers may vary. The provided solutions offer a reference and a structured way to think about the duration of activities.
What kind of activities are discussed in Chapter 7?
The chapter discusses a wide range of activities, from simple daily tasks like boiling milk or taking a bath to longer processes like knitting a sweater, growing a plant, or preparing for exams.
Why is it important to learn about time durations in Class 3?
Understanding time durations helps students develop a sense of order, efficiency, and planning in their daily lives, which are foundational skills for mathematics and life in general.
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