NCERT Revision Notes for Class 3 Maths Chapter 3: Double Century – Free PDF Download

A quick summary of Class 3 Maths Chapter 3 — counting, comparing, and understanding numbers from 100 to 200.

Last Updated: September 10, 2026

Class 3 Maths Chapter 3 Revision Notes: Double Century

Chapter type: Numbers — extending number sense from 100 to 200.

Key ideas to remember:

Counting 100 to 200 xe2x80x94 saying numbers in order from 100 up to 200, and backward from 200 to 100.

Hundreds (informal) xe2x80x94 understanding that 100 means 1 hundred, and 200 means 2 hundreds.

Comparing numbers 100-200 xe2x80x94 the number with more hundreds is bigger; if hundreds match, compare tens, then ones.

What you should be able to do after this chapter:

1. Count forward and backward between 100 and 200.
2. Find the number before, after, or between two given numbers in this range.
3. Compare two numbers between 100 and 200 to say which is greater.

Remember: The same comparison rule from Class 2 still applies, just extended: compare the biggest place value first (now hundreds), then tens, then ones only if needed.

Frequently Asked Questions

Will this chapter teach numbers beyond 200?
No — numbers up to 1000 are covered later in the book, in the House of Hundreds chapters.

How does this chapter connect to later ones?
It is a direct stepping stone to House of Hundreds xe2x80x93 I and II, which extend number sense and place value up to 1000.

Written by Satish

NCERTBooks.org is an independent educational resource run by a small team focused on making official NCERT textbooks easy to find, read, and download for students, parents, and teachers across India. We are not affiliated with NCERT or the Ministry of Education -- we organise publicly available NCERT content by class and subject, verify links against official sources, and build tools (like our in-browser reader) that make studying more convenient. Every guide we publish is written and reviewed by our team based on the actual NCERT curriculum and syllabus.