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CBSE Class 3 Mathematics★ 3-4 marks through school tests, activities, notebook work, and competency questions in CBSE Class 3 Mathematics (Maths Mela)

Vacation with My Nani Maa

A CBSE Class 3 Mathematics (Maths Mela) chapter that practises addition and subtraction through a holiday with Nani Maa (grandmother). Children add and take away with two- and three-digit numbers, estimate totals, and solve real-life word problems. These notes give core ideas, worked examples, an activity, common mistakes, a practice set with answers, and quick revision.

⏱ 16 min readEasy difficulty✓ Free · NCERT-aligned

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By the end of this chapter you'll be able to…

1Add two- and three-digit numbers with regrouping
2Subtract with borrowing where needed
3Decide whether a word problem needs addition or subtraction
4Estimate sums and differences to the nearest ten
5Write answers with the correct unit

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Why this chapter matters

Vacation with My Nani Maa practises addition and subtraction in a real holiday context. Children learn to decide when to add and when to subtract, work with two- and three-digit numbers, estimate, and solve everyday word problems.

Before you start — revise these

A 5-minute refresher here will save you 30 minutes of confusion below.

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Addition and subtraction to 100

Adding and subtracting two-digit numbers.

Vacation with My Nani Maa — Class 3 Mathematics (CBSE)

From the current NCERT Maths Mela Grade 3 book, Chapter 4. A holiday at grandmother's house becomes full of sums — collecting stamps, sharing sweets, and packing bags.

1. Why this chapter matters

Addition and subtraction are used every single day — to find a total, to give change, or to see how many are left. This chapter sets these skills in a fun holiday story so that children learn to decide when to add and when to subtract, and to check if the answer makes sense.

2. Core ideas

Idea 1 — Addition puts amounts together

When we join groups, we add. 47 sweets and 25 more sweets → 47 + 25 = 72.

Method 2 — Subtraction takes away or finds the difference

When we take away or compare, we subtract. 72 sweets, 30 eaten → 72 − 30 = 42 left.

Skill 3 — Estimate to check

Round to the nearest ten to guess the answer, then compare with your exact sum.

3. Worked examples

Example 1: Nani has 36 stamps and gets 28 more. How many now?

36 + 28 = 64 stamps. (Estimate: 40 + 30 = 70, so 64 is sensible.)

Example 2: There were 85 mangoes; 47 were given away. How many remain?

85 − 47 = 38 mangoes.

Example 3: Add or subtract? "Riya had 50 rupees and spent 35 rupees."

"Spent" means take away → 50 − 35 = 15 rupees left.

4. Activity corner

Make a "holiday shop" with price tags at home. Buy two items and find the total; then find the change from 100 rupees. Write:

What I added or subtracted
The numbers I used
The maths idea (deciding add or subtract from the words)

5. Common mistakes

Mistake: Adding when the problem says "left" or "more than". Fix: Read the words — "left", "remaining", "how many more" usually mean subtract.
Mistake: Forgetting to carry or borrow. Fix: Line up ones under ones, tens under tens; regroup neatly.
Mistake: Not checking the answer. Fix: Estimate, or do the reverse operation, to check.

6. How to write better answers

Write the numbers given.
Decide the operation from the words (add or subtract).
Show the working in columns.
Write the answer in a complete sentence with the unit (rupees, mangoes…).
Check by estimation.

7. Practice set

Add: 54 + 38.
Subtract: 90 − 46.
Nani picks 63 flowers, then 19 more. How many in all?
There were 120 laddoos; 45 were eaten. How many are left?
Estimate 58 + 33 to the nearest ten.
"Aman had 75 marbles and lost 28." Add or subtract? Solve.

8. Answer key

54 + 38 = 92.
90 − 46 = 44.
63 + 19 = 82 flowers.
120 − 45 = 75 laddoos left.
About 60 + 30 = 90 (exact is 91).
"Lost" means subtract: 75 − 28 = 47 marbles.

9. Quick revision

Add to join groups; subtract to take away or compare.
Read the words to choose the operation (left, more, in all).
Line up ones and tens; regroup when needed.
Estimate to the nearest ten to check.
Always write the unit in the final answer.

Key formulas & results

Everything you need to memorise, in one card. Screenshot this for revision.

Core idea

Addition joins groups; subtraction takes away or finds the difference.

47 + 25 = 72; 72 - 30 = 42.

Math move

Line up ones under ones and tens under tens, then regroup (carry or borrow).

Neat columns prevent place-value mistakes.

Exam habit

Estimate to the nearest ten to check the exact answer.

Words like left, remaining, and how many more usually mean subtract.

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Common mistakes & fixes

These are the exact errors that cost students marks in board exams. Read them once, save yourself the trouble.

WATCH OUT

✗ Adding when the problem says left or more than

✓ Read the words; left, remaining, and how many more usually mean subtract.

WATCH OUT

✗ Forgetting to carry or borrow

✓ Line up ones and tens and regroup carefully.

WATCH OUT

✗ Not checking the answer

✓ Estimate, or do the reverse operation, to check.

NCERT exercises (with solutions)

Every NCERT exercise from this chapter — what it covers and how many questions to expect.

Read, observe, and discuss

Use the holiday pictures and number-grid games from the textbook to decide add or subtract before writing answers.

Questions

Notebook practice

Column addition and subtraction, word problems, and estimation to the nearest ten.

Questions

Project or activity

Set up a holiday shop with price tags, find totals, and work out the change from 100 rupees.

Questions

Practice problems

Try each one yourself before tapping "Show solution". Active recall > rereading.

Q1EASY· Add

Add: 54 + 38.

▶ Show solution

92.

Q2EASY· Subtract

Subtract: 90 - 46.

▶ Show solution

44.

Q3MEDIUM· Word problem

Nani picks 63 flowers, then 19 more. How many in all?

▶ Show solution

63 + 19 = 82 flowers.

Q4MEDIUM· Word problem

There were 120 laddoos; 45 were eaten. How many are left?

▶ Show solution

120 - 45 = 75 laddoos left.

Q5MEDIUM· Estimate

Estimate 58 + 33 to the nearest ten.

▶ Show solution

About 60 + 30 = 90 (the exact answer is 91).

Q6HARD· Reasoning

Aman had 75 marbles and lost 28. Add or subtract? Solve.

▶ Show solution

Lost means subtract: 75 - 28 = 47 marbles.

5-minute revision

The whole chapter, distilled. Read this the night before the exam.

•Vacation with My Nani Maa is Chapter 4 of the Class 3 Maths Mela textbook.
•Add to join groups; subtract to take away or compare.
•Read the words to choose the operation (left, more, in all).
•Line up ones and tens; regroup when needed.
•Estimate to the nearest ten to check.
•Write the unit in every final answer.

CBSE marks blueprint

Where the marks come from in this chapter — so you can plan your prep.

Typical chapter weightage: 3-4 marks in school tests, oral checks, notebooks, and activities

Question type	Marks each	Typical count	What it tests
Very Short	1	2-3	Direct addition or subtraction sums
Short Answer	2	1-2	Word problems or estimation
Activity / Project	3	0-1	Shop activity with totals and change

Prep strategy

Practise column addition and subtraction with regrouping
Read word problems and underline the keyword (left, in all, more)
Estimate before solving
Always write the unit in the answer

Where this shows up in the real world

This chapter isn't just an exam topic — it lives in the world around you.

Shopping and money

Adding prices and finding change uses addition and subtraction every day.

Counting collections

Stamps, marbles, and sweets are joined or shared using these operations.

Quick estimates

Estimating totals helps make fast, sensible decisions.

Exam strategy

Battle-tested tips from teachers and toppers for this chapter.

Underline the keyword that signals add or subtract
Show working in neat columns
Write the answer in a sentence with the unit
Check the answer using estimation or the reverse operation

Going beyond the textbook

For olympiad aspirants and curious learners — topics that build on this chapter.

Make a two-step problem: add two amounts, then find the change from 200 rupees.
Find two numbers that add to 100 and also have a difference of 20.

Where else this chapter is tested

CBSE board isn't the only one — other exams test this chapter too.

CBSE Class 3 School AssessmentHigh

Class 3 Foundation / Olympiad PracticeMedium

Notebook and Activity EvaluationHigh

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Questions students ask

The real ones — pulled from the Q&A community and tutor sessions.

Read the problem. Words like 'in all', 'altogether', and 'more' usually mean add. Words like 'left', 'remaining', and 'how many more' usually mean subtract.

Estimating first gives a quick check. If your exact answer is far from the estimate, you can spot a mistake.

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