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Question
When a positive integer is added to a negative integer. What is the answer?
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Solution
The result will depend on which is greater.
eg - -2 + 6 = +4
- 6 + 2 = -4
- 6 + (-6) = -6 - 6 = -12
- 6 - (+12) = - 6 - 12 = - 18
- 6 - (- 12) = - 6 + 12 = 6
⎧⎪
⎪
⎪⎨⎪
⎪
⎪⎩−x−=+−x+=−+x+=++x−=−⎫⎪
⎪
⎪⎬⎪
⎪
⎪⎭
eg - -2 + 6 = +4
- 6 + 2 = -4
- 6 + (-6) = -6 - 6 = -12
- 6 - (+12) = - 6 - 12 = - 18
- 6 - (- 12) = - 6 + 12 = 6
⎧⎪ ⎪ ⎪⎨⎪ ⎪ ⎪⎩−x−=+−x+=−+x+=++x−=−⎫⎪ ⎪ ⎪⎬⎪ ⎪ ⎪⎭
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