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Adding and Subtracting POSITIVE and NEGATIVE NUMBERS
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| A | B |
| 18+ -9 | 9 |
| -17+8 | -9 |
| 8+ -16 | -8 |
| -8+15 | 7 |
| 7+ -14 | -7 |
| 14+ -6 | 8 |
| -13+7 | -6 |
| 8+ -13 | -5 |
| -12+6 | -6 |
| 12+ -7 | 5 |
| 9+ -12 | -3 |
| -8+12 | 4 |
| 6+7 | 13 |
| -8+ -5 | -13 |
| 6+6 | 12 |
| -9+ -3 | -12 |
| 5+9 | 14 |
| -8+ -6 | -14 |
| 9+9 | 18 |
| -9+ -8 | -17 |
| 7+9 | 16 |
| -8+ -8 | -16 |
| -8+8 | 0 |
| 6+ -7 | -1 |
| 5+ -9 | -4 |
| 8- (-6) | 14 |
| 8- (+6) | 2 |
| -5-(-5) | 0 |
| -5-(+5) | -10 |
| -3-(+4) | -7 |
| -3-(-4) | 1 |
| 15-(-9) | 24 |
| 9-(+15) | -6 |
| 9-(-15) | 24 |
| -9-(+15) | -24 |
| -9-(-15) | 6 |
| 3-(-3) | 6 |
| -3-(-3) | 0 |
| -3-(+3) | -6 |
| 3-(+3) | 0 |
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