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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 |
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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
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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. |
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How to multiply/divide numbers with the same sign. |
Do the math and make the answer positive.
(-) x (-) always equals + |
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How to multiply/divide numbers with different signs. |
Do the math and make the answer negative.
(+) / (-) always equals - |