Rules for Addition and Multiplication of Integers
Rules  
To Add two numbers that have the same sign:

1) 69 = 6 + 9 = 15 2) 7+8 = +7 + +8 = +15 = 15 
To Add
two numbers that have different signs:

1) 6+9 = 6 + +9 = +3 = 3 2) 7+8 = +7 + 8 = 1 
When you Multiply
(or Divide) two numbers that have :

When you Multiply
(or Divide) two numbers that have :
