House of Hundreds - I – Class 3 Maths Chapter 6 Notes & NCERT PDF

Class 3MathematicsChapter 6NCERT book: Maths Mela - Class 3

Notes and a simple summary of Chapter 6 of the NCERT Class 3 Mathematics book, with the official chapter PDF, flashcards, an MCQ quiz and an AI tutor for your doubts.

🎧 Listen to the content

Chapter 6: House of Hundreds - I

Introduction

In House of Hundreds - I, Ajji, Teji and Jojo visit a mela and count bigger things: triangular torans, bangles, toffees and sweets. Children count beyond 200 up to 500, learn to read and write 3-digit numbers, see hundreds, tens and ones, and compare numbers using the signs > and <.

What's in this Chapter

1. Counting at the mela.

Triangular torans: "50 more than 200, which is 250".

Bangles: 200 and 80 more is 280 (counting in tens, then ones).

Toffees: 298 in boxes and Jojo holds 2: 298 + 1 = 299, 299 + 1 = 300.

Questions: 50 more triangles make 300; bangles are 20 less than 300; so there are more bangles than triangles.

2. Number sentences. A number can be written more than one way: 235 = 200 and 35 more (200 + 35) = 15 less than 250 (250 − 15). The number slider shows +1, +10, −2, −10, +20 changes (147 + 10 = 157; 289 − 10 = 279).

3. Flag game. Teji thinks of a number between 200 and 210. Each guess gets a flag pointing right (the number is more) or left (it is less), until 207 is found.

4. Magical Count. Write a number name, count its letters, write that number's name, and repeat: "Two hundred and thirty five" has 23 letters, then Twenty-three (11), Eleven (6), Six (3), Three (5), Five (4), and it ends at FOUR.

5. Number lines to 500. After 300 comes four hundred. Children locate numbers such as 216, 243, 257 and 329-387. 387 is 13 away from 400; 400 is more than 393.

6. Farooq Chacha's sweet shop and apartments. Counting trays of mysore pak, laddoos and dhoklas. House numbers in apartment buildings follow patterns: one floor above 105 is 115; one floor above 201 is 211. Sweets are packed in boxes of 100 (H), 10 (T) and loose ones (O): 211 = 2H + 1T + 1O = 200 + 10 + 1. One box of 100 holds 10 boxes of 10.

7. Comparing numbers.

487 > 423, and 423 < 487 ("the open mouth points towards the bigger number").

321 > 231, because 3 hundreds are more than 2 hundreds.

209 < 290: both have 2 hundreds, but 9 ones are less than 9 tens.

Children make 3-digit numbers from 3, 2 and 4 and arrange numbers from smallest to biggest.

Key Ideas

Big collections are easier to count in groups of 10 and 100.

A 3-digit number = hundreds + tens + ones.

To compare, look at hundreds first, then tens, then ones.

Words to Learn

Hundred: 10 tens (सौ)

Mela: fair (मेला)

Compare: find which is more or less (तुलना करना)

Greater than (>): more than (से बड़ा)

Less than (<): smaller than (से छोटा)

Floor: level of a building (मंज़िल)

Digit: 0 to 9 (अंक)

Pattern: something that repeats in a rule (पैटर्न)

Tips for Parents & Teachers

Count coins or beads in groups of 10 at home.

Play the flag guessing game with numbers from 200 to 300.

Look at house or flat numbers in your area and find patterns.

Common Mistakes

Comparing only the last digits (thinking 209 > 290 because 9 > 0).

Writing "two hundred and five" as 2005.

Reversing the > and < signs.

💡 Key Learning Points

✓Count objects beyond 200 up to 500 using groups of 10 and 100.
✓Read, write and represent 3-digit numbers as hundreds, tens and ones (211 = 200 + 10 + 1).
✓Write a number in different number sentences (235 = 200 + 35 = 250 − 15).
✓Compare 3-digit numbers using > and <, checking hundreds first.
✓Find patterns in house numbers (one floor up = 10 more).

👨‍🏫 Teaching Tips

→Ask why children got different counts and show why grouping by 10 helps (teacher's note).
→Make a number slider (TLM) and play +1, +10, −10 games.
→Play the flag game on the board, then in pairs.
→Use Dienes blocks (given at the end of the book) or squared-notebook cut-outs for H, T, O.
→Let children fill apartment grids by spotting patterns rather than counting.
→Try the Magical Count with different starting numbers; does it always end with four?
→Show 'open mouth points to the bigger number' with a crocodile drawing.

📋 Assessment Questions

Can the child count a large collection correctly using tens?
Can the child write a number as H + T + O and as a number sentence?
Can the child compare two 3-digit numbers and use > or < correctly?
Can the child place numbers such as 423 and 487 on a number line?

Ask the AI tutor about Class 3 Mathematics Chapter 6

Get question answers, important questions, a quick MCQ quiz or a simple explanation of “House of Hundreds - I”. Free — sign in with Google.

How the AI tutor works →