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CHAPTER
NUMBER SYSTEM 1
Topics Covered 95%
Data Representation
Hello, Shweta! Welcome to class VII. Number Systems
Conversion of Decimal to Binary
Conversion of Binary to Decimal
Operations on Binary Numbers
Thank you, Techie! We missed you during the break. Now we are fresh and
eager to begin the new session. What are we going to discuss today?
My dear Shweta, throughout your primary classes, your teachers have made you
count from 1 to 100, 101 to 200, and so on. This system of representing numbers
is known as the decimal number system. However, this is not the only system
available to us. There are many more.
That does sound interesting, Techie, but we are confused. Please tell me in detail.
Maintain that curiosity, kid! You’ll find out everything in this chapter. Let’s get
started!
Number System 7

