Let’s work through each problem step by step using the number line method described.
We start at the first number, then move right for positive numbers and left for negative numbers. The number of steps we move equals the absolute value of the second number.
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1. 8 + (-4)
Start at 8. Add -4 → move 4 steps to the left.
8 → 7 → 6 → 5 → 4
✔ Answer:
4
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2. -2 + (-2)
Start at -2. Add -2 → move 2 steps to the left.
-2 → -3 → -4
✔ Answer:
-4
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3. 1 + (-6)
Start at 1. Add -6 → move 6 steps to the left.
1 → 0 → -1 → -2 → -3 → -4 → -5
✔ Answer:
-5
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4. -9 + 9
Start at -9. Add 9 → move 9 steps to the right.
-9 → -8 → -7 → -6 → -5 → -4 → -3 → -2 → -1 → 0
✔ Answer:
0
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5. -7 + (-3)
Start at -7. Add -3 → move 3 steps to the left.
-7 → -8 → -9 → -10
✔ Answer:
-10
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6. 3 + (-9)
Start at 3. Add -9 → move 9 steps to the left.
3 → 2 → 1 → 0 → -1 → -2 → -3 → -4 → -5 → -6
✔ Answer:
-6
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7. -8 + 7
Start at -8. Add 7 → move 7 steps to the right.
-8 → -7 → -6 → -5 → -4 → -3 → -2 → -1
✔ Answer:
-1
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Final Answer:
4, -4, -5, 0, -10, -6, -1
Parent Tip: Review the logic above to help your child master the concept of adding integers number line worksheet.
