
1.1 
Integers 


Definition 





Positive and negative whole numbers including \(0\).




Positive numbers: 

 Numbers written with the '\(+\)' sign or without any sign.
 Examples: \(+12, 4, +7, 1\)
 Positive integers are integers that have a value greater than \(0\).


Negative numbers: 

 Numbers written with the '\(\)' sign.
 Examples: \(6, 2, 15, 27\)
 Negative integers are integers that are lower than \(0\).



Example 





Determine whether the following numbers is an integer.
(i) \(\dfrac{7}{2}\)
(ii) \(6.8\)
(iii) \(12\)






(i) \(\dfrac{7}{2}\) is not an integer because it is a fraction.
(ii) \(6.8\) is not an integer because it is a decimal.
(iii) \(12\) is an integer.




Integers on a number line: 

 On a number line, the numbers in the positive direction are always greater than the numbers in the negative direction.


Integers in order: 

 A positive number always has a larger value than a negative number.
