Adding Integers with Negative Numbers

-11 + 7

-4 + 2

Adding integers with the SAME sign you

• add the integers and keep the sign

• add the numbers and make it always negative

• keep the subtraction

• subtract and keep the sign

Adding integers with different signs you

• add the numbers and forget the sign

• subtract the integers and keep the sign of the greatest absolute value.

• turn the sign negative

• turn the sign positive

12 + (-2)

• -10

• -14

• 14

• 10

Solve:
80 + (-8) =

• 88

• -88

• 72

• -72

Solve:
-15  -  3 =

• 12

• -12

• -18

• 18

Solve:
-7(6) =

• -13

• -48

• 42

• -42

When adding integer with different signs...

• use the greatest absolute value to find the sum

• add the numbers and the term with the greatest absolute value will determine the sign for the sum

• multiplying the same signs will give you a positive product

• subtract the numbers and the term with the greatest absolute value will determine the sign for the sum

For 2-(-2).... the two negatives turn this equation into...

• 2-2

• 2+2

• 2+-2