Absolutely! Let’s solve
Activity 3: Working with Negative Numbers step by step. The worksheet gives you 25 problems involving addition and subtraction of positive and negative integers. You’re encouraged to use the number line provided — which goes from -20 to +20 — to visualize each operation.
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🧠 Key Rules to Remember:
-
Adding a positive number → move
right on the number line.
-
Adding a negative number → move
left on the number line.
-
Subtracting a positive number → move
left on the number line.
-
Subtracting a negative number → move
right (because subtracting a negative is like adding a positive).
Alternatively, you can think of it as:
>
“Same signs → add and keep the sign. Different signs → subtract and take the sign of the larger absolute value.”
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Let’s solve each problem one by one:
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✔ Problems 1–5
1.
-12 + 8
Start at -12, move 8 right →
-4
2.
6 – 17
Same as 6 + (-17). Start at 6, move 17 left →
-11
3.
-14 + 7
Start at -14, move 7 right →
-7
4.
1 – 14
Same as 1 + (-14) → start at 1, move 14 left →
-13
5.
-11 + 4
Start at -11, move 4 right →
-7
---
✔ Problems 6–10
6.
-17 + 11
Start at -17, move 11 right →
-6
7.
12 – 24
12 + (-24) → start at 12, move 24 left →
-12
8.
7 – 19
7 + (-19) → start at 7, move 19 left →
-12
9.
-11 + 8
Start at -11, move 8 right →
-3
10.
3 – 18
3 + (-18) → start at 3, move 18 left →
-15
---
✔ Problems 11–15
11.
14 – 21
14 + (-21) → start at 14, move 21 left →
-7
12.
-19 + 21
Start at -19, move 21 right →
+2
13.
16 – 18
16 + (-18) → start at 16, move 18 left →
-2
14.
-12 + 26
Start at -12, move 26 right →
+14
15.
4 – 28
4 + (-28) → start at 4, move 28 left →
-24
---
✔ Problems 16–20
16.
2 – 15
2 + (-15) → start at 2, move 15 left →
-13
17.
-8 + 19
Start at -8, move 19 right →
+11
18.
6 – 17
6 + (-17) → start at 6, move 17 left →
-11
19.
13 – 25
13 + (-25) → start at 13, move 25 left →
-12
20.
-4 + 16
Start at -4, move 16 right →
+12
---
✔ Problems 21–25
21.
-6 + 18
Start at -6, move 18 right →
+12
22.
11 – 21
11 + (-21) → start at 11, move 21 left →
-10
23.
-19 + 6
Start at -19, move 6 right →
-13
24.
4 – 19
4 + (-19) → start at 4, move 19 left →
-15
25.
-6 + 22
Start at -6, move 22 right →
+16
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## 🎯 Final Answers:
Here are all 25 answers in order:
1.
-4
2.
-11
3.
-7
4.
-13
5.
-7
6.
-6
7.
-12
8.
-12
9.
-3
10.
-15
11.
-7
12.
2
13.
-2
14.
14
15.
-24
16.
-13
17.
11
18.
-11
19.
-12
20.
12
21.
12
22.
-10
23.
-13
24.
-15
25.
16
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✔ Tip: Use the number line to double-check any answer — especially if you're unsure. For example, for
-19 + 21, start at -19 and count 21 steps to the right: you’ll land on
+2.
Let me know if you want a printable version or more practice problems! 😊
Parent Tip: Review the logic above to help your child master the concept of negative numbers worksheet.
