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 Positive + Positive = Positive 5 + 3 = 8 Negative + Negative = Negative (- 6) + (- 3) = - 9 Sum of a negative and a positive number Keep the sign of the larger number and subtract (- 6) + 3 = -3 9 + (-12) = - 3 (- 5) + 7 = 2 4 + ( -2) = 2.

Subtracting Real Numbers:

 Negative - Positive = Negative (same as adding two negative numbers) (- 8) - 3 = -8 + (-3) = -11 Positive - Negative = Positive + Positive = Positive 4 - (-3) = 4 + 3 = 7 Negative - Negative = Negative + Positive = Keep the sign of the larger number and subtract (-7) - (-5) = ( -7) + 5 = -2 (-5) - ( -7) = (-5) + 7 = 2

Multiplying Real Numbers:

 Positive x Positive = Positive 3 x 4 = 12 Negative x Negative = Positive (-3) x (-5) = 15 Negative x Positive = Negative (-3) x 2 = -6 Positive x Negative = Negative 3 x (-2) = -6

Dividing Real Numbers:

 Positive ÷ Positive = Positive 18 ÷ 3 = 6 Negative ÷ Negative = Positive (-18) ÷ (-3) = 6 Negative ÷ Positive = Negative (-18) ÷ 3 = -6 Positive ÷ Negative = Negative 18 ÷ (-3) = -6.

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