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 Description  
 Decimal:  A symbol that uses a base-ten place-value system with multiples of tenths to represent a number.
Decimal System

Since the Latin prefix "decem" means "tenth," decimal means a number based on tenths. The use of place value to represent integers in the decimal system can also be used to represent rational numbers. We extend the system for writing integers by using a decimal point. The decimal point indicates that the numbers to its right are less than 1. Place value also plays a role with the numbers to the right of the decimal. As numbers proceed to the right, they become smaller by a power of 10.

 Hundreds  Tens  Ones

decimal point 

 Tenths  Hundredths  Thousandths
 100   10   1

.

  1/10   1/100   1/1000
   2  3

.

 6  7  0
 7  5  6

.

 2  0  1
     0

.

 4    
   9  0

.

0  6  


Examples of Bar Notation



The bar notation is used for repeating decimals.