operations with positive and negative numbers

Positive + Positive =

Positive

Ex:

7+8 =15

Negative + negative =

Negative

Ex:

-7 + (-8) =-15

Negative + Positive Or Positive + Negative =

Keep the sign of the number of the number with the larger value

Ex:

-7 + 8 =1

7 + -8 =-1

Positive x Positive =

Positive

Ex:

8 × 4 = 32

Negative x Negative =

Positive

Ex:

-8 x (-4) =32

Positive x Negative OR Negative x Positive =

Negative

Ex:

8 x (-4) =-32

-8 × 4 =-32

Negative - Positive =

Negative

Ex:

-7 - 8 = -7 + (-8) =-15

Positive + Negative =

Negative

Ex:

7 - (-8) = 7 + 8 = 15

Negative - Negative =

Change to addition and change second number sign, then add

Ex:

-7 - (-8) = -7 + 8 =1

-8 - (-7) = -8 + 7 =1

Positive ÷ Positive =

Positive

Ex:

8 ÷ 4 = 2

Negative ÷ Negative =

Positive

Ex: -8 ÷ (-4) = 2

Positive ÷ Negative or Negative ÷ Positive =

Negative

Ex:

8 ÷ (-4) = -2

-8 ÷ 4 = -2