NCERT Revision Notes for Class 3 Maths Chapter 6: House of Hundreds xe2x80x93 I – Free PDF Download

A quick summary of Class 3 Maths Chapter 6 — 3-digit numbers, place value (hundreds, tens, ones), and expanded form.

Last Updated: September 10, 2026

Class 3 Maths Chapter 6 Revision Notes: House of Hundreds xe2x80x93 I

Chapter type: Numbers — place value with 3-digit numbers.

Key ideas to remember:

Hundreds place xe2x80x94 the leftmost digit of a 3-digit number, showing how many hundreds it contains.

Tens place xe2x80x94 the middle digit of a 3-digit number, showing how many tens it contains.

Ones place xe2x80x94 the rightmost digit of a 3-digit number, showing how many single units it contains.

Expanded form xe2x80x94 writing a number as the sum of its place values, e.g. 347 = 300 + 40 + 7.

What you should be able to do after this chapter:

1. Identify the hundreds, tens, and ones digit in a 3-digit number.
2. Write a 3-digit number in expanded form, and combine expanded form back into a standard number.
3. Read and write 3-digit numbers and their number names.

Remember: Always read place value from left to right — hundreds first, then tens, then ones — this order matches how the number is written and makes expanded form easy to build.

Frequently Asked Questions

Why is place value so important?
It is the foundation for every later arithmetic topic — addition, subtraction, multiplication, and division all rely on correctly understanding what each digit in a number is worth.

How does this chapter connect to House of Hundreds xe2x80x93 II?
House of Hundreds xe2x80x93 II continues with 3-digit numbers, adding addition and subtraction using the place value understood here.

Written by Satish

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