Lecture1

# Lecture1 - 1/10 ENSC150 Lecture 1 Agenda Number Systems...

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ENSC150 Lecture 1 Agenda Number Systems: Conversion Focus on Binary, Octal, and Hexadecimal Some Coding Techniques 1/10 Atousa Hajshirmohammadi, SFU Lecture 1

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Numbers A bit of history: Origins of the science of mathematics have been traced back to 3rd millennium B.C.E. However, the concept of “zero” was not discovered until 200-300 B.C.E! Roman numeral system: Symbols: Rules: A smaller number on the “left” of another number, means subtraction of the number on the left from the number on the right. Otherwise, the numbers are added. Example: Write 89 in Roman symbols: Arithmetic operations using Roman system are very complicated! 2/10 Atousa Hajshirmohammadi, SFU Lecture 1
Modern systems use the concept of “place holders”. Consider the system we are used to today; the “Decimal system": Decimal symbols (digits): Decimal place holders represent Example: 1096 = Numbers can be represented in other bases also. An

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Lecture1 - 1/10 ENSC150 Lecture 1 Agenda Number Systems...

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