Let’s solve each problem step by step.
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Problem 1: -9 + 3 = ?
Start at -9 on the number line. Add 3 → move 3 steps to the right.
-9 → -8 → -7 → -6
✔ Answer:
-6
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Problem 2: -6 + 7 = ?
Start at -6. Add 7 → move 7 steps right.
-6 → -5 → -4 → -3 → -2 → -1 → 0 → 1
✔ Answer:
1
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Problem 3: -49 + (50 - 8) = ?
First, solve inside the parentheses: 50 - 8 = 42
Now: -49 + 42
Start at -49, add 42 → move 42 steps right.
-49 + 42 = -7
✔ Answer:
-7
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Problem 4: 233 - 73 = ?
Simple subtraction:
233 - 73 = 160
✔ Answer:
160
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Problem 5: 3 + (-178) = ?
Adding a negative is like subtracting:
3 - 178 = -175
✔ Answer:
-175
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Problem 6: -67 + 66 = ?
Start at -67, add 66 → move 66 steps right.
-67 + 66 = -1
✔ Answer:
-1
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Problem 7: 6 - 10 = ?
Start at 6, subtract 10 → move 10 steps left.
6 → 5 → 4 → ... → -4
✔ Answer:
-4
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Problem 8: -2 + (4 + 3) = ?
First, solve inside parentheses: 4 + 3 = 7
Now: -2 + 7 = 5
✔ Answer:
5
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Problem 9: -239 + 3 = ?
Start at -239, add 3 → move 3 steps right.
-239 + 3 = -236
✔ Answer:
-236
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Problem 10: 490 - 500 = ?
Subtract: 490 - 500 = -10
✔ Answer:
-10
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Final Answer:
-6, 1, -7, 160, -175, -1, -4, 5, -236, -10
Parent Tip: Review the logic above to help your child master the concept of 7th grade math worksheet with answer key pdf.
