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5 Cards in this Set

  • Front
  • Back

How to add numbers


with the same sign

just add them


and keep the sign.


ex: -6 + -2 = -8

How to add numbers


with different signs

subtract them; and


keep the sign of the number


that had the


largest A.V.


ex: (-12) +10= think


(12-10 is 2) so


(-12) + 10 = -2


How to subtract


numbers with


signs.

Don't; Instead the opposite by using


the addition rules.


ex: -6 - 4


is re-witten as


-6 + (-4)= (6+4 is is 10)


so -6 +(-4)= -10


keeping the sign.

How to multiply/divide numbers with the same sign.

Do the math and make the answer


positive.



(-) x (-) always equals +

How to multiply/divide numbers with different signs.

Do the math and make the answer


negative.



(+) / (-) always equals -