CBSE Class 2 Mathematics Chapter 4: Counting in Tens NCERT Solutions

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NCERT Solutions PDF Class 2 PDF

This chapter, 'Counting in Tens,' for CBSE Class 2 Mathematics, focuses on building foundational number sense by grouping objects into tens. Students will learn to count collections of items by forming bundles or baskets of ten. The exercises guide them through understanding how to represent numbers in terms of tens and ones, and how to perform simple addition and subtraction related to these groupings. This chapter is crucial for developing an intuitive understanding of place value and preparing students for more complex arithmetic operations. These NCERT Solutions provide clear, step-by-step explanations to help students grasp the concept of counting in tens, reinforcing their learning and aiding in exam preparation.

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Quick info

BoardCBSE
ClassClass 2
SubjectMathematics
Session2026
LanguageEnglish
TypeNCERT Solutions
ChapterChapter 4

Chapter summary

Chapter 4, 'Counting in Tens,' for Class 2 Mathematics NCERT Solutions, introduces students to the concept of grouping items into sets of ten. It covers counting objects by forming tens and ones, understanding numbers like 50+4=54, and relating these to real-life scenarios such as counting chickens or sticks. The chapter also touches upon simple subtraction related to these tens and ones. These solutions aim to make learning about tens and ones engaging and straightforward for young learners.

Learning outcomes

  • Understand the concept of grouping objects into tens.
  • Count collections of items by forming tens and ones.
  • Represent numbers using tens and ones.
  • Solve simple addition and subtraction problems involving tens.
  • Relate counting in tens to real-world examples.

Topics covered

Paper topics

  • Counting in Tens
  • Grouping Objects
  • Tens and Ones
  • Number Representation
  • Addition with Tens
  • Subtraction with Tens
  • Place Value Introduction

Important topics

  • Understanding groups of ten
  • Counting by tens
  • Forming numbers with tens and ones
  • Relating tens to numbers like 50, 40

PDF preview

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Questions and Solutions

Question 1

In the morning, she counted her chickens. • How many baskets of 10 chickens are there? _____ • How many chickens are there in all? 50 + 4 =
Image showing chickens in baskets
Solution:

Let's analyze the image and the given information to answer the questions.

• To find the number of baskets of 10 chickens, we look at how the chickens are grouped. The image shows 5 distinct groups, each representing a basket containing 10 chickens. Therefore, there are 5 baskets of 10 chickens.

• To find the total number of chickens, we add the chickens in the baskets (tens) and the chickens that are not in baskets (ones). The problem states 50 + 4 =. This means there are 5 tens (which is 50) and 4 ones. So, the total number of chickens is 50 + 4 = 54.

Answer:

5 baskets of 10 chickens are there.

54 chickens are there in all.

Question 2

In the evening, she counted the chickens again. • There are baskets of 10 chickens. • There are _____ + 3 = chickens in all. • 54 - = chickens have been eaten by the fox.
Image showing chickens, some missing
Solution:

We need to determine the number of chickens in the evening based on the information provided and the previous count of 54 chickens.

• The problem states that there are chickens left. Looking at the image, we can count the remaining baskets of 10 chickens. There are 4 full baskets of 10 chickens visible. So, there are 4 baskets of 10 chickens.

• The total number of chickens in the evening is given by the number of chickens in the baskets plus the remaining ones. The problem indicates a calculation of 43 + 3 = chickens in all. This implies there were 4 tens (40 chickens) and 3 ones, making a total of 43 chickens, plus 3 more chickens, for a total of 46 chickens. However, the source text has a mathematical error in the provided solution for this part. Based on the visual and the context of counting in tens, if there are 4 baskets of 10 chickens, that's 40 chickens. If there are also 3 loose chickens, the total would be 43. The provided solution states 43 + 3 = 43, which is incorrect. Assuming the intention was to show 4 baskets and 3 loose chickens, the total would be 43. Let's proceed with the assumption that there are 4 baskets and 3 loose chickens, making the total 43.

• To find out how many chickens have been eaten by the fox, we subtract the number of chickens remaining in the evening from the number of chickens in the morning. The number of chickens in the morning was 54. If we assume the total in the evening is 43 (as implied by 4 baskets of 10 and 3 loose chickens), then the number eaten is 54 - 43 = 11 chickens.

Answer:

There are 4 baskets of 10 chickens.

There are 40 + 3 = 43 chickens in all. (Note: The original source had a mathematical error here.)

11 chickens have been eaten by the fox. (Calculated as 54 - 43)

Question 1

He uses 10 sticks to make 1 bundle. • 3 bundles have _____ sticks. Now, how many sticks in all are these? _____ sticks in all. • 4 bundles would have _____ sticks.
Image showing bundles of sticks
Solution:

We are given that 1 bundle contains 10 sticks. We need to calculate the number of sticks for different numbers of bundles.

• For 3 bundles, the total number of sticks is the number of bundles multiplied by the number of sticks per bundle. So, 3 bundles have 3 \times 10 = 30 sticks.

• The question asks 'Now, how many sticks in all are these? _____ sticks in all.' This part seems to be asking for the total sticks if we consider the 3 bundles plus some additional loose sticks. Based on the provided answer, it seems there are 3 loose sticks in addition to the 3 bundles. Therefore, the total sticks in all would be the sticks in the bundles plus the loose sticks: 30 + 3 = 33 sticks in all.

• For 4 bundles, the total number of sticks is calculated similarly: 4 bundles would have 4 \times 10 = 40 sticks.

Answer:

3 bundles have 30 sticks.

33 sticks in all. (Assuming 3 loose sticks in addition to the 3 bundles)

4 bundles would have 40 sticks.

Question 1

How many garlands of 10 flowers each can you make using 21 flowers? Draw them in the space below.
Solution:

We need to find out how many complete garlands of 10 flowers can be made from a total of 21 flowers.

To do this, we can think of how many groups of 10 are there in 21. We can divide 21 by 10.

21 \div 10 = 2 \text{ with a remainder of } 1

This means we can make 2 full garlands, each using 10 flowers. This will use 2 \times 10 = 20 flowers.

After making 2 garlands, we will have 21 - 20 = 1 flower left over. This leftover flower is not enough to make another garland of 10 flowers.

Therefore, you can make 2 garlands of 10 flowers each using 21 flowers.

The space below would be used to draw these 2 garlands, perhaps showing 10 flowers in each, and then the 1 remaining flower separately.

Common mistakes

  • Confusing tens and ones in number representation.
  • Errors in adding or subtracting numbers based on tens and ones.
  • Difficulty in visualizing groups of ten from a larger collection.

Revision tips

  • Practice grouping everyday objects into tens.
  • Use flashcards to reinforce numbers formed by tens and ones.
  • Review the examples of counting chickens and sticks to understand the concept better.
  • Try to create your own problems based on counting in tens.

Practice MCQs

Q1. If there are 5 baskets, and each basket has 10 chickens, how many chickens are there in total in the baskets?

Q2. If you have 3 bundles of sticks, and each bundle has 10 sticks, how many sticks are in the bundles?

Q3. How many garlands of 10 flowers each can be made from 21 flowers?

Q4. If there are 54 chickens in total and 4 baskets contain 10 chickens each, how many chickens are outside the baskets?

Frequently asked questions

What is the main concept taught in CBSE Class 2 Maths Chapter 4?

Chapter 4, 'Counting in Tens,' teaches students how to count objects by grouping them into sets of ten, understanding numbers in terms of tens and ones, and performing basic arithmetic related to these groupings.

How do these NCERT Solutions help students?

These solutions provide clear, step-by-step explanations for each question, helping students understand the concept of counting in tens and reinforcing their learning for better comprehension and exam preparation.

What kind of problems are covered in this chapter?

The chapter includes problems on counting collections of items by forming tens (like baskets of chickens or bundles of sticks), representing numbers as tens and ones, and simple addition and subtraction related to these quantities.

Why is counting in tens important for Class 2 students?

Learning to count in tens is a fundamental step towards understanding place value, which is crucial for developing number sense and performing more complex mathematical operations in the future.

Important links

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