CBSE Class 2 Mathematics Chapter 14: Birds Come, Birds Go - NCERT Solutions
This chapter, 'Birds Come, Birds Go,' from the CBSE Class 2 Mathematics curriculum, focuses on foundational concepts of addition and subtraction. The NCERT Solutions provided here break down problems involving counting and combining quantities, as well as finding the difference between them. Students will work with real-world scenarios, such as counting birds and calculating runs in a cricket match, to understand how these arithmetic operations are applied. The solutions offer a clear, step-by-step approach to solving each problem, reinforcing the understanding of place value and carrying over/borrowing in addition and subtraction. These solutions are designed to help students build confidence and accuracy in their mathematical skills, making them an excellent resource for exam preparation and revision.
Quick info
| Board | CBSE |
|---|---|
| Class | Class 2 |
| Subject | Mathematics |
| Session | 2026 |
| Language | English |
| Type | NCERT Solutions |
| Chapter | Chapter 14 |
Chapter summary
Chapter 14 of the CBSE Class 2 Mathematics NCERT Solutions, titled 'Birds Come, Birds Go,' introduces basic addition and subtraction concepts through relatable examples. It covers problems involving combining two quantities to find a total and finding the difference between two numbers. The exercises focus on applying these operations to scenarios like counting birds and calculating scores, reinforcing the understanding of two-digit addition and subtraction with regrouping.
Learning outcomes
- Understand the concept of addition by combining quantities.
- Apply subtraction to find the difference between two numbers.
- Solve word problems involving addition and subtraction of two-digit numbers.
- Reinforce place value understanding in addition and subtraction.
- Develop problem-solving skills using real-life examples.
Topics covered
Paper topics
- Addition of two-digit numbers
- Subtraction of two-digit numbers
- Word problems on addition
- Word problems on subtraction
- Counting and combining
- Finding the difference
- Place value in arithmetic
Important topics
- Addition of two-digit numbers
- Subtraction of two-digit numbers
- Solving word problems
- Understanding addition and subtraction concepts
PDF preview
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Questions and Solutions
Question 1
To find the total number of swans and cranes, we need to add the number of swans and the number of cranes together. This is an addition problem involving two-digit numbers.
Number of Swans = 39
Number of Cranes = 31
We set up the addition vertically, aligning the tens and ones digits:
39 + 31
First, add the ones digits: 9 + 1 = 10. Write down 0 in the ones place and carry over 1 to the tens place.
Next, add the tens digits along with the carry-over: 1 (carry-over) + 3 + 3 = 7. Write down 7 in the tens place. 1 39
+ 31
----- 70 The total number of swans and cranes is 70.
Question 1
This problem involves finding out how many birds are missing from the original group. This means we need to use subtraction. We start with the total number of birds and subtract the number of birds that are left.
Total number of birds = 70
Number of birds left = 26
To find the number of birds that have gone away, we subtract the birds left from the total birds:
70 - 26
We set up the subtraction vertically, aligning the tens and ones digits: 70 - 26
-----
First, subtract the ones digits: 0 - 6. Since 0 is smaller than 6, we need to borrow from the tens place. We borrow 1 ten from the 7 tens, leaving 6 tens. The 1 ten we borrowed becomes 10 ones. So, we have 10 - 6 = 4 in the ones place.
Next, subtract the tens digits: 6 (after borrowing) - 2 = 4. Write down 4 in the tens place.
6 10 7 0 - 2 6
----- 4 4 Therefore, 44 birds have gone away.
Question 1
To find the total number of runs scored by Rahul and Dhoni, we need to add their individual scores. This is an addition problem involving two-digit numbers.
Rahul's score = 23 runs
Dhoni's score = 69 runs
We add their scores together:
23 + 69
Set up the addition vertically, aligning the tens and ones digits: 23 + 69
-----
Add the ones digits: 3 + 9 = 12. Write down 2 in the ones place and carry over 1 to the tens place.
Add the tens digits along with the carry-over: 1 (carry-over) + 2 + 6 = 9. Write down 9 in the tens place. 1 23
+ 69
----- 92 They made 92 runs in all.
Question 2
To find the total number of shawls Dema sold over the two days, we need to add the number of shawls sold on the first day and the number of shawls sold on the second day. This is an addition problem with two-digit numbers.
Shawls sold on the first day = 48
Shawls sold on the next day = 17
We add these two numbers:
48 + 17
Set up the addition vertically, aligning the tens and ones digits: 48 + 17
-----
Add the ones digits: 8 + 7 = 15. Write down 5 in the ones place and carry over 1 to the tens place.
Add the tens digits along with the carry-over: 1 (carry-over) + 4 + 1 = 6. Write down 6 in the tens place. 1 48
+ 17
----- 65 In all, Dema sold 65 shawls.
Common mistakes
- Errors in carrying over in addition.
- Mistakes in borrowing in subtraction.
- Incorrectly identifying the operation (addition vs. subtraction) needed for a word problem.
- Calculation errors with two-digit numbers.
Revision tips
- Practice all the solved examples to understand the methods.
- Focus on the step-by-step approach for each problem.
- Try to solve the problems yourself before checking the solution.
- Relate the word problems to real-life situations to build intuition.
Practice MCQs
Q1. In a group of birds, there were 39 swans and 31 cranes. What is the total number of birds?
Explanation: To find the total, we add the number of swans and cranes: 39 + 31 = 70.
Q2. If there were 70 birds and 44 flew away, how many birds are left?
Explanation: To find the number of birds left, we subtract the birds that flew away from the total: 70 - 44 = 26.
Q3. Rahul scored 23 runs and Dhoni scored 69 runs. What is their combined score?
Explanation: The total runs are found by adding their individual scores: 23 + 69 = 92.
Q4. Dema sold 48 shawls on the first day and 17 on the second day. How many shawls did he sell in total?
Explanation: To find the total shawls sold, add the sales from both days: 48 + 17 = 65.
Frequently asked questions
What is the main topic of CBSE Class 2 Mathematics Chapter 14?
Chapter 14, 'Birds Come, Birds Go,' focuses on basic addition and subtraction concepts using word problems and real-life examples.
How do these NCERT Solutions help Class 2 students?
These solutions provide clear, step-by-step explanations for each problem, helping students understand how to solve addition and subtraction problems accurately.
Are the questions in this chapter about addition or subtraction?
The chapter includes problems that require both addition (to find totals) and subtraction (to find differences).
What kind of examples are used in Chapter 14?
The chapter uses examples like counting birds and calculating cricket scores to make learning addition and subtraction more engaging.
How can I use these solutions for revision?
You can use these solutions to review the methods for solving addition and subtraction word problems, and to check your answers after attempting the problems yourself.
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