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Chapter Summary

Double Century — Chapter Summary

CBSE · Class 3 · Mathematics

Summary of Double Century for CBSE Class 3 Mathematics. Key concepts: People first kept records by, Ancient Indians created and 0 means nothing.

44 questions64 flashcards7 formulas & key relations5 concepts

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Overview

Double Century explains how numbers are written, counted, and built using place value. It begins with the old ways of counting, then shows the importance of the symbol 0, the use of 0 to 9 for writing any number, and the idea of making 100 in different ways. It also shows how numbers move beyond 100

Key Concepts

People first kept records by making

People first kept records by making marks on cave walls and tree barks. Later, they used groups of 5, 10, 20, and 60 to count and record things.

Ancient Indians created a method

Ancient Indians created a method to write any number using only ten symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

0 means nothing

0 means nothing, but it is very important in writing numbers correctly. It helps make the number system work properly.

100 can be made in different

100 can be made in different ways, such as 70 and 30, 65 and 35, or 60 and 40. These are all pairs that add up to 100.

A number can be split into

A number can be split into hundreds, tens, and ones. For example, 150 has 1 hundred, 5 tens, and 0 ones.

Learning Objectives

  • Understand how people counted in early times using marks and groups.
  • Learn why the symbol 0 is important in writing numbers.
  • Recognize that ten symbols, 0 to 9, can write any number.
  • Make 100 in different ways using number jumps and bundles.
  • Write numbers from 101 to 110 using hundreds, tens, and ones.

Frequently Asked Questions

What are the important topics in Double Century for CBSE Class 3 Mathematics?
Key topics in Double Century include The Story of Numbers, Making 100, Numbers Beyond 100, Clap, Snap, Pat Game. Study these first, then practise questions on each for Class 3 exams.
How should I revise Double Century for Class 3 exams?
Learn the core ideas first, then work through the 44 practice questions on Double Century. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Double Century

All CBSE Class 3 Mathematics Chapter Summary

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