Grade 9 Adding Integers Worksheets 2024 - Free Printable

Let’s solve each problem one by one. We’re adding integers — that means positive and negative whole numbers.

Remember:
- Adding two negatives? Add their absolute values and keep the negative sign.
- Adding a positive and a negative? Subtract the smaller absolute value from the larger, and take the sign of the number with the bigger absolute value.
- Adding zero? The number stays the same.

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1) (-20) + (-2)
→ Both negative → add 20 + 2 = 22 → answer is -22

2) (-29) + 15
→ Different signs → subtract 29 - 15 = 14 → since 29 is bigger and negative → answer is -14

3) 18 + 9
→ Both positive → 18 + 9 = 27

4) 12 + (-6)
→ Different signs → 12 - 6 = 6 → 12 is bigger and positive → answer is 6

5) (-11) + 4
→ Different signs → 11 - 4 = 7 → 11 is bigger and negative → answer is -7

6) (-7) + (-10)
→ Both negative → 7 + 10 = 17 → answer is -17

7) 8 + 16
→ Both positive → 8 + 16 = 24

8) 24 + (-1)
→ Different signs → 24 - 1 = 23 → 24 is bigger and positive → answer is 23

9) (-15) + (-1)
→ Both negative → 15 + 1 = 16 → answer is -16

10) (-2) + 2
→ Opposites → they cancel out → answer is 0

11) (-14) + 6
→ Different signs → 14 - 6 = 8 → 14 is bigger and negative → answer is -8

12) 19 + (-9)
→ Different signs → 19 - 9 = 10 → 19 is bigger and positive → answer is 10

13) 28 + 0
→ Adding zero → stays 28

14) (-1) + (-13)
→ Both negative → 1 + 13 = 14 → answer is -14

15) (-23) + 7
→ Different signs → 23 - 7 = 16 → 23 is bigger and negative → answer is -16

16) 25 + (-5)
→ Different signs → 25 - 5 = 20 → 25 is bigger and positive → answer is 20

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Final Answer:
1) -22
2) -14
3) 27
4) 6
5) -7
6) -17
7) 24
8) 23
9) -16
10) 0
11) -8
12) 10
13) 28
14) -14
15) -16
16) 20