NCERT Class 3 Maths (Maths Mela) · Chapter 6

House of Hundreds – I

Numbers up to 999: counting in hundreds and tens, place value (H, T, O), number lines, and comparing with > and <.

📌 What you’ll learn in this chapter
  • Counting beyond 200 using groups of 10 and 100
  • Hundreds, Tens, and Ones (H, T, O)
  • Writing number sentences: 235 = 200 + 35
  • Finding numbers on a number line
  • Comparing numbers using > (more than) and < (less than)

🎡 Let’s Begin: The Mela Count

At the Dussehra mela, a bangle-seller has bangles on sticks. Each stick holds 10 bangles. There are 32 sticks. How many bangles? Count in tens: 10, 20, 30 … 300, 310, 320. Easy!

🏠 Part 1: Hundreds, Tens, and Ones

Take the number 347:

Hundreds (H)Tens (T)Ones (O)
347
300407

347 = 300 + 40 + 7 = three hundred forty-seven

⚠️ Common mistake “Four hundred five” written as 45 or 4005. ❌ There are no tens, so write a 0: 405.

📏 Part 2: Number Line

235 lies between 200 and 250 (a bit before 250). 387 is 13 away from 400. After 999 comes 1,000!

Counting on: 297, 298, 299, 300, 301… · In tens: 380, 390, 400, 410…

🏢 Part 3: The Apartment Pattern

In a building with 10 houses on each floor: going up one floor adds 10, and going one house right adds 1. So 1 floor above 105 is 115, and 10 floors above 13 is 113.

⚖️ Part 4: Comparing Numbers

  1. Compare the hundreds first: 321 > 231 (3 hundreds > 2 hundreds).
  2. If the hundreds are the same, compare the tens: 290 > 209.
  3. If the tens are the same too, compare the ones: 157 > 153.
💡 Crocodile trick 🐊 The open mouth of > or < always faces the bigger number: 487 > 423 and 423 < 487.

✏️ Practice Time

Try these on your own first, then check your answer below each question.

Q1. Write 3 hundreds, 6 tens, and 2 ones as a number.
✅ Answer362
Q2. 500 + 8 = ?
✅ Answer508
Q3. Compare: 436 __ 463
✅ Answer436 < 463
Q4. What is 10 more than 395?
✅ Answer405

📘 NCERT Textbook Activity Help

Hints and answers for the activities in the textbook, page by page. Try each one yourself before looking at the answer!

Pages 64–65 · Torans, bangles, and toffees

Counting beyond 200

✅ AnswerTriangles: 250 · Bangles: 280 · Toffees: 298 + 2 = 300
50 more triangles make 300. The bangles are 20 less than 300. There are more bangles (280) than triangles (250).
Pages 66–67 · Tiles and blanks

Counting and number sentences

✅ AnswerTiles: 211, 212, 213, 214, 215, 216…
(a) 294 … 302 … 310: count on by 1 · (b) 227 … 234: by 1 · (c) 382 … 390: by 1
Ants: count them in groups of 10.
300 and 16 more = 316 · 109 = 100 and 9 more
Page 68 · Number slider

Increase and decrease

✅ Answer(a) 286 (b) 157 (c) 365 (d) 279 (e) 310
Pages 69–70 · Flag game and magical count

Guessing and letters

✅ AnswerThe flag points right when the number is bigger than the guess, and left when it is smaller. The number was 207.
Magical count: yes, it always ends with FOUR, because “four” has exactly 4 letters! The next hundred after 300 is 400.
Pages 71–72 · Number lines and sweets

Locate numbers

✅ Answer387 is 13 away from 400. 400 is more than 393, by 7.
Sweet shop: count the pieces in one tray, then multiply by the number of trays (each tray label says 100). Count the laddoo and dhokla trays the same way. Mark 500 at the end of the number line (after 493, the next jump of 10 is 503, so 500 comes just before it).
Pages 73–75 · Apartments

House numbers

✅ AnswerGoing up one floor adds 10, and going right adds 1.
Floor and column: 67 → floor 6, column 7 · 106 → 10, 6 · 159 → 15, 9 · 192 → 19, 2 · 231 → 23, 1 · 245 → 24, 5 · 328 → 32, 8 · 380 → 37, 10 · 399 → 39, 9
Who am I? 159 · 400 (or 404, 440) · 303
Pages 76–78 · Sweet boxes and number hunt

H, T, O

✅ Answer309 = 3H + 0T + 9O = 300 + 9 · 275 = 2H + 7T + 5O · 423 = 4H + 2T + 3O · 365 · 343 · 458 · 562 · 606 = 6H + 0T + 6O · 800 = 8H
Spring Leap Homes: house numbers go up by 10 going up a floor, and by 1 going right.
Boxes of 10: (a) 10 (b) 20 (c) 40 (d) 10
Numbers from 200 to 300 with a 5: 205, 215, 225, 235, 245, 250–259, 265, 275, 285, 295. Yes, 245 is one of them. There are 19 in all.
Pages 79–81 · Comparing

> and <

✅ Answer(a) 201 > 199 (199 is less) (b) 285 > 275 (more)
Matching: (a) 325 & 235 → 3 hundreds vs 2 hundreds · (b) 235 & 523 → 2 hundreds vs 5 hundreds · (c) 157 & 153 → 7 ones vs 3 ones · (d) 432 & 423 → 3 tens vs 2 tens · (e) 329 & 392 → 2 tens vs 9 tens · (f) 110 & 11 → 1 hundred vs no hundreds
Smallest: (a) 347 (b) 123 · Greatest: (a) 483 (b) 464
Using 3, 2, 4 without repeating: 234, 243, 324, 342, 423, 432. Red = 432, yellow = 234. With repeats, the greatest is 444 and the smallest is 222.
7. (a) 99, 110, 207, 389, 456 (b) 494, 376, 294, 249, 67

👨‍👩‍👧 Tips for Parents

  • Use ₹100, ₹10, and ₹1 play money to make numbers like 347.
  • Play the flag guessing game with numbers from 1 to 500.
  • Ask your child to read house numbers and bus numbers aloud.
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