Relative integers
Calculation rules
Before ALL
calculation, identify which operation it is!
Then follow the instructions for this operation.
Then follow the instructions for this operation.



YES  
Same signs
Find the SUM: 

NO  
Differnet signs:
Find theDIFFERENCE: 
(3) + (6) = (9)
(+4) + (+5) = (+9) 

(+5) + (7) = (2)
(4) + (+6) = (+2) 

Always: Keep the sign of the number with the GREATER absolute value. 

First, we must transform the SUBTRACTION into ADDITION;
Then we follow the rules for the ADDITION.
(6)  (+2) =
1. The first number remains the same. 2. Turn subtraction into addition. 3. Invert the sign of the second number 4. Follow the rules for addition. 

(6)  (+2) = (6) (6) + (6) + (2) (6) + (2) = (8) 
Substract means:

(+2)  (6) =
(+2) + (+6) = (+8)  
Substract means:

(7)  (3) =
(7) + (+3) = (4)  
Substract means:

(+4)  (+9) =
(+4) + (9) = (5) 

First, YOU MUST DO the multiplication or division.
Then we determine the sign:
We count the number of negative signs....
Yes  AnEVEN number of négative sign 
the result is POSITIVE 
NO  AnODD number of négative sign  the result is NEGATIVE 

(2) * (4) * (6)  
DO the multiplication or division, neglecting the signs: 

2 * 4 * 6 = 48 
Count the number of negative signs ....
Determine the sign of the result: 

(2) * (4) * (6) = 
Is there an EVEN number of negative signs?


In total THREE NEGATIVE SIGNS
Three is ODD . So the result is NEGATIVE 48 
In total ZERO NEGATIVE SIGNS ZERO IS EVEN . So the result is POSITIVE 

In total ONE NEGATIVE SIGN One is ODD . So the result is NEGATIVE 

In total TWO NEGATIVE SIGNS TWO IS EVEN . So the result is POSITIVE 