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14 terms

Rules for adding, subtracting, multiplying & dividing positive & negative integers

Rules for adding, subtracting, multiplying & dividing positive & negative integers
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Positive + Positive = Positive
5 + 4 = 9
Negative + Negative = Negative
(- 7) + (- 2) = - 9
Sum of a negative and a positive number: Use the sign of the larger number and subtract
(- 7) + 4 = -3
6 + (-9) = - 3
(- 3) + 7 = 4
5 + ( -3) = 2
Negative - Positive = Negative
(- 5) - 3 = -5 + (-3) = -8
Positive - Negative = Positive + Positive = Positive
5 - (-3) = 5 + 3 = 8
Negative - Negative = Negative + Positive = Use the sign of the larger number and subtract (Change double negatives to a positive)
(-5) - (-3) = ( -5) + 3 = -2
(-3) - ( -5) = (-3) + 5 = 2
Positive x Positive = Positive
3 x 2 = 6
Negative x Negative = Positive
(-2) x (-8) = 16
Negative x Positive = Negative
(-3) x 4 = -12
Positive x Negative = Negative
3 x (-4) = -12
Positive ÷ Positive = Positive:
12 ÷ 3 = 4
Negative ÷ Negative = Positive:
(-12) ÷ (-3) = 4
Negative ÷ Positive = Negative:
(-12) ÷ 3 = -4
Positive ÷ Negative = Negative:
12 ÷ (-3) = -4