Examples:

Basic mathematics uses these formulas in every addition and summation.it is compulsory for basic maths for beginners.


1) +5 + 3 = + 8



The number will get plus n get the bigger number sign.
    
      Which is easy many students do correct answer of this sign convention? Almost everyone.

2) -5 - 3 = - 8

The number will get plus n get the bigger number sign.
    
      Which is the typical one?
      Many students do the wrong answer to this sign convention.
     Students do the number minus and give minus sign to that number.

- - = -
The above one is used in basic skill test exams.it is a basic maths test questions too. 

i.e 5-3=2 and the sign gives minus.

Answer = -2

Note:  - -   =  -
           + + = +