Whole Numbers

There are situations in which Natural Numbers are not enough :

- When the temperature is zero or below zero 
- When I go to the car park under my building:
- When I have no money or I owe money to someone:  

In these situations, we need the negative numbers and zero:   -5, -4, -3, -2, -1, 0

Then, when we add the zero and the negative numbers to the Natural Numbers, we obtain the Whole Numbers.

We name these numbers with

Z = {... -4, -3, -2, -1, 0, 1, 2, 3, 4,...}

and represent them in a straight line:



1.- Associate a Whole Number to these sentences:

a) The temperature is 5 degrees below zero.

b) I live in the sixth floor.

c) I park my car in the second floor of the parking under my building.


2.- Represent these numbers in the line: -3, 5, 7, 0, -11




Solutions: 1.- a) -5; b) 6; c) -2


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