Integer addition practice worksheet with 20 problems involving positive and negative numbers.

Let's solve each of these integer addition problems step by step. Remember the rules for adding integers:

- Same signs: Add absolute values and keep the common sign.
- Different signs: Subtract the smaller absolute value from the larger, and use the sign of the number with the larger absolute value.

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1. $ 5 + (-16) + 15 $

First: $ 5 + (-16) = -11 $
Then: $ -11 + 15 = 4 $
✔ Answer: 4

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2. $ 0 + (-8) + (-7) $

$ 0 + (-8) = -8 $
$ -8 + (-7) = -15 $
✔ Answer: -15

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3. $ (-16) + 0 + 5 $

$ -16 + 0 = -16 $
$ -16 + 5 = -11 $
✔ Answer: -11

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4. $ -4 + (-19) + 15 $

$ -4 + (-19) = -23 $
$ -23 + 15 = -8 $
✔ Answer: -8

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5. $ (-18) + (-5) + (-17) $

All negative: add absolute values: $ 18 + 5 + 17 = 40 $ → $ -40 $
✔ Answer: -40

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6. $ (-17) + (-15) + (-11) $

Add: $ 17 + 15 + 11 = 43 $ → $ -43 $
✔ Answer: -43

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7. $ (-11) + 18 + 5 $

$ -11 + 18 = 7 $
$ 7 + 5 = 12 $
✔ Answer: 12

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8. $ (-10) + (-16) + 7 $

$ -10 + (-16) = -26 $
$ -26 + 7 = -19 $
✔ Answer: -19

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9. $ (-15) + (-19) + 5 $

$ -15 + (-19) = -34 $
$ -34 + 5 = -29 $
✔ Answer: -29

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10. $ (-13) + 18 + 5 $

$ -13 + 18 = 5 $
$ 5 + 5 = 10 $
✔ Answer: 10

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11. $ 12 + (-11) + 6 $

$ 12 + (-11) = 1 $
$ 1 + 6 = 7 $
✔ Answer: 7

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12. $ (-9) + (-11) + (-17) $

All negative: $ 9 + 11 + 17 = 37 $ → $ -37 $
✔ Answer: -37

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13. $ 2 + (-15) + (-10) $

$ 2 + (-15) = -13 $
$ -13 + (-10) = -23 $
✔ Answer: -23

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14. $ (-10) + (-8) + (-9) $

$ 10 + 8 + 9 = 27 $ → $ -27 $
✔ Answer: -27

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15. $ (-12) + 8 + (-13) $

$ -12 + 8 = -4 $
$ -4 + (-13) = -17 $
✔ Answer: -17

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16. $ 19 + (-3) + (-7) $

$ 19 + (-3) = 16 $
$ 16 + (-7) = 9 $
✔ Answer: 9

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17. $ (-15) + (-1) + (-9) $

All negative: $ 15 + 1 + 9 = 25 $ → $ -25 $
✔ Answer: -25

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18. $ (-8) + 15 + 13 $

$ -8 + 15 = 7 $
$ 7 + 13 = 20 $
✔ Answer: 20

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19. $ (-8) + (-9) + 15 $

$ -8 + (-9) = -17 $
$ -17 + 15 = -2 $
✔ Answer: -2

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20. $ 22 + (-9) + (-10) $

$ 22 + (-9) = 13 $
$ 13 + (-10) = 3 $
✔ Answer: 3

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✔ Final Answers:

| Problem | Answer |
|--------|--------|
| 1 | 4 |
| 2 | -15 |
| 3 | -11 |
| 4 | -8 |
| 5 | -40 |
| 6 | -43 |
| 7 | 12 |
| 8 | -19 |
| 9 | -29 |
| 10 | 10 |
| 11 | 7 |
| 12 | -37 |
| 13 | -23 |
| 14 | -27 |
| 15 | -17 |
| 16 | 9 |
| 17 | -25 |
| 18 | 20 |
| 19 | -2 |
| 20 | 3 |

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