Double Century
CBSE · Class 3 · Mathematics
Quick revision notes for Double Century — CBSE Class 3 Mathematics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
The Story of Our Numbers
- Ancient people counted by making marks on cave walls and tree barks
- They made groups of 5, 10, 20, and 60 to count things
- Ancient Indians created a method to write any number using only 10 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Understanding 100
- 100 is written as 'One Hundred'
- 100 can be made by adding different pairs of numbers
- Examples: 70 + 30 = 100, 45 + 55 = 100, 25 + 75 = 100
Numbers from 101 to 110
- 101 is written as 'One Hundred One' (100 and 1)
- 102 is written as 'One Hundred Two' (100 and 2)
- Continue this pattern up to 110
Numbers from 111 to 200
- Numbers from 111 to 119 follow the pattern: One Hundred + Teen numbers
- 120 is 'One Hundred Twenty', 130 is 'One Hundred Thirty', etc.
- 150 is 'One Hundred Fifty' (1 hundred, 5 tens, 0 ones)
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What are the important topics in Double Century for CBSE Class 3 Mathematics?
Double Century covers several key topics that are frequently asked in CBSE Class 3 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Double Century — CBSE Class 3 Mathematics?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.
Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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