Double Century
This chapter explores the concept of counting and writing numbers, especially focusing on numbers beyond 100. It discusses the history of numerical systems and introduces the concept of using symbols to represent numbers.
We Already Know
- Counting numbers
- Numerical symbols
We will learn in this chapter
- Writing numbers beyond 100
- Representing numbers using matchstick bundles
History of Numerical Systems
People started counting thousands of years ago by making marks on various surfaces. Ancient Indians introduced a numerical system using ten symbols (0-9), which revolutionized numerical representation.
- Making marks on caves and trees
- Introduction of numerical symbols by ancient Indians
Representation of Numbers
Numbers can be represented using matchstick bundles and loose sticks to understand place value and counting in a visual manner.
- Representing numbers above 100 using matchstick bundles
- Using matchsticks to make different numbers
Number Line and Estimation
Understanding the number line, estimating quantities, and counting to reach specific numbers.
- Estimating seeds in a container
- Jumping game on the number line
Video
▶️ Introduction to Writing Numbers
This video explains the history of numerical systems and how matchstick bundles can be used to represent numbers beyond 100.