DICTIONARY‎ > ‎Numbers‎ > ‎

Integers

Description: 

Numbers can be Positive or Negative. Positive numbers are over zero an Negative numbers are below zero. 





(-) Negative Numbers                                  Positive Numbers (+) 

                                                
                                                                                                                    
                                         “-” this sign means                          “+” this sign means 

                           that the number is negative              that the number is positive 


If a number has no sign it means, that this number is positive. 

12 is the same as +12

If a number has minus it means, that this number is negative.




Adding Positive and Negative numbers



"Subtracting a Negative" is the same as "Adding Positive"

6-(-3) = 6+3 = 9

"Adding Negative" is the same as "Subtracting Positive":

7+(-2) = 7-2 = 5 

Adding two Negative numbers:

-2+(-2) = -4 

Subtracting two negative numbers:

-7-(-2) = -7+2 = -5




Multiplying and Dividing Positive&Negative Numbers


When you multiply: 



9 x 2 = 18


-9 x 2 = -18


-9 x (-2) = 18 



There are the same rules in dividing.



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