- Decimal number
system has ten digits ranging from 0-9. And because this system has 10 digits
it’s called
**a base 10 number system or denary number system**. - A decimal number
should always be written with a subscript 10 e.g.
**X**_{10}but because it’s the most commonly used number system in the world, the subscript is ignored. However in this topic, its necessary to denote the subscript because we are dealing with various number systems.
- The magnitude of a number system is evaluated using three parameters namely:
1.
Absolute value2.
Place value or
positional value3.
Base value- is the magnitude of a digit.
*For example:*in a number 67948 digit 9 has a value of 9 so, 9 is the absolute value
- of a digit in a number refers to the
position of the digit making the number.
*for example:*the place value of 9 in a number 67948 is hundreds
- of a number is also known as the
**radix**. Since 67948 is a decimal or a 10 number system, it can be written as 67948_{10}. Where subscript 10 is referred as the radix or base value. - This kind of number system is what we mostly use in our daily lives
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