Addition and Subtraction of INTEGERS

   Addition and Subtraction of INTEGERS

Addition of Intergers

Rule 1:

• For integers of the same sign:
• add the numbers and copy the sign of the highest given numbers
• For integers of opposite signs:
• subtract the numbers and copy the sign of the bigger number

Let's try it!

       Example 1:

                       (-4) + (-8) = ?

              The integers have the same signs therefore, the operation should be addition and then copy the sign of the highest given number.

          

                       (-4) + (-8) = -12

       Example 2:

                       (9) + (-17) = ?

              The integers have different signs therefore, the operation should be subtraction then copy the sign of the highest given number.

                        (9) + (-17) = -8

Subtraction of Integers

     Rule 1:

• Change the sign of the subtrahend then proceed with addition. 

Let's try it!

          Example 1:

                      (-10) - (12) =?

                Change the sign of the subtrahend then proceed with addition.

                   

                      (-10) - (12) = -22

        

          Example 2:

                      (-13) - (-34) =?

                The integers have similar sign, and both negative. 

         

                      (-13) - (-34) = ?

                      (-13) + (34) = -21

Try this by yourself!

1. (3) + (-9) = ?
2. (-4)- (18) = ?
3. (-9) - (-5) = ?
4. (10) + (16) = ?
5.  (32) - (20) = ?

        “If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is.” ― John von Neumann


                                                HOPE YOU'VE LEARNED SOMETHING! :)