Vacation with My Nani Maa – Class 3 Maths Chapter 4 Notes & NCERT PDF

Class 3MathematicsChapter 4NCERT book: Maths Mela - Class 3

Notes and a simple summary of Chapter 4 of the NCERT Class 3 Mathematics book, with the official chapter PDF, flashcards, an MCQ quiz and an AI tutor for your doubts.

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Chapter 4: Vacation with My Nani Maa

Introduction

Chirag and Nandini spend their vacation with Nani Maa, their best friend, who loves stories and puzzles. Through gifts, stamps, a field of radishes and an apple orchard, the chapter builds addition and subtraction up to 100 and a little beyond, using tens frames, the ginladi, number lines, matchstick bundles and box diagrams.

What's in this Chapter

1. The magic trick. Nani Maa knows the total number of marbles, looks at those on the table and says how many are hidden under the handkerchief. If the total is 15 and 12 are on the table, 3 are hidden (total minus what you see).

2. Balushahi and books.

Nandini had 7 balushahi and Chirag had 5: 7 + 5 = 12.

They bought the same number, but Chirag ate some: 7 − 5 = 2 eaten.

Chirag got 9 story books and Nandini 7 puzzle books: 9 + 7 = 16.

3. Stamps. 15 stamps + 7 more = 22, shown three ways on the ginladi: +1 seven times; +5 then +2; +10 then −3. Nani Maa's brother gives 30 more: 22 + 30 = 52. Of these, 37 show famous persons, so 52 − 37 = 15 show monuments. To reach 75 they need 75 − 52 = 23 more.

4. Number grid game. Roll two dice to make a two-digit number and move forward (or backward) on a 1-100 grid. Nandini at 23 gets 11 and reaches 34 (+10, +1).

5. Magic sums. Rows and columns add up to given totals. In the magic square

2 7 6 / 9 5 1 / 4 3 8

every row, column and diagonal adds up to 15.

6. In the fields.

25 red radishes + 36 white radishes = 61

A box of 100 vegetables had 65 tomatoes, so it has 100 − 65 = 35 carrots

Nandini plucked 85 apples and Chirag 67: together 152, and Nandini collected 18 more

7. Word problems with box diagrams.

Babli didi sold 34 and 45 books: 79 in all, 11 more on Tuesday

Team Red made 56 + 65 = 121 runs

Gehu had 56 plants and 29 are left, so 27 dried up

Key Ideas

Addition = putting together; subtraction = taking away or finding the difference.

One problem can be solved in many ways (jumps of 1, 5 or 10; bundles; number line).

Estimate first ("80 and 20 is 100, so 85 + 67 is more than 100").

A box diagram shows the parts and the whole.

Activities from the Book

Perform the hidden-seeds trick with friends.

Card game: collect three cards that make an addition or subtraction statement (2, 4, 6).

Race to 100: each player adds 1 to 10; first to reach 100 wins.

Words to Learn

Total / sum: all together (कुल / योग)

Difference: how much more or less (अंतर)

Estimate: a sensible guess (अनुमान)

Hidden: kept out of sight (छिपा हुआ)

Tens frame: a frame with 10 boxes (दस का ढाँचा)

Magic square: numbers where every line adds up to the same (जादुई वर्ग)

Tips for Parents & Teachers

Play the handkerchief trick with coins or beans.

Use shopping at home: "We had 52, we used 37, how many are left?"

Ask children to show their jumps on a number line; accept different ways.

Common Mistakes

Adding when the question asks "how many more".

Forgetting to carry the extra ten (25 + 36 is 61, not 51).

Counting the starting number as a jump on the number line.

💡 Key Learning Points

✓Find a missing part using total minus known part (hidden-marbles trick).
✓Add and subtract 2-digit numbers using ginladi, number line, bundles and tens frames.
✓Solve one problem in several ways and compare strategies.
✓Use box diagrams to understand word problems.
✓Explore magic squares where rows, columns and diagonals add to the same total (15).

👨‍🏫 Teaching Tips

→Start with the handkerchief trick using seeds; let children discover 'total minus seen'.
→Encourage different jump strategies on the number line, as the teacher's note says.
→Use a real ginladi or bead string for the stamp problem.
→Play the grid game with two dice; allow moving backward if a move goes past 100.
→Draw box diagrams on the board before solving word problems.
→Let children create word problems for classmates.

📋 Assessment Questions

Can the child find the hidden number when total and seen parts are known?
Can the child add and subtract 2-digit numbers with and without regrouping?
Can the child explain two different ways to solve 15 + 7?
Can the child say whether an answer will be more or less than 100 before solving?

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