Let's solve the "Missing Part" worksheet step by step. The goal is to
find the missing number in each addition equation so that the sum matches the given total.
---
🔢 Problem Set: Find the missing part
We'll go through each problem one by one and solve for the blank (□).
---
1.
1 + □ = 3
→ 3 - 1 =
2
✔ Answer:
2
2.
2 + 2 + □ = 5
→ 2 + 2 = 4, so 5 - 4 =
1
✔ Answer:
1
3.
1 + □ + 1 = 4
→ 1 + 1 = 2, so 4 - 2 =
2
✔ Answer:
2
4.
□ + 1 = 8
→ 8 - 1 =
7
✔ Answer:
7
5.
□ + 1 + 2 = 6
→ 1 + 2 = 3, so 6 - 3 =
3
✔ Answer:
3
6.
□ + 2 + 1 = 7
→ 2 + 1 = 3, so 7 - 3 =
4
✔ Answer:
4
7.
3 + 2 + □ = 5
→ 3 + 2 = 5, so 5 - 5 =
0
✔ Answer:
0
8.
4 + 4 + □ = 9
→ 4 + 4 = 8, so 9 - 8 =
1
✔ Answer:
1
9.
0 + □ + 1 = 4
→ 0 + 1 = 1, so 4 - 1 =
3
✔ Answer:
3
10.
2 + □ + 1 = 4
→ 2 + 1 = 3, so 4 - 3 =
1
✔ Answer:
1
11.
□ + 1 + 2 = 8
→ 1 + 2 = 3, so 8 - 3 =
5
✔ Answer:
5
12.
□ + 1 + 2 = 10
→ 1 + 2 = 3, so 10 - 3 =
7
✔ Answer:
7
13.
3 + 3 + □ = 7
→ 3 + 3 = 6, so 7 - 6 =
1
✔ Answer:
1
14.
1 + 0 + □ = 4
→ 1 + 0 = 1, so 4 - 1 =
3
✔ Answer:
3
15.
3 + □ + 3 = 9
→ 3 + 3 = 6, so 9 - 6 =
3
✔ Answer:
3
16.
1 + □ + 1 = 5
→ 1 + 1 = 2, so 5 - 2 =
3
✔ Answer:
3
17.
□ + 3 + 1 = 6
→ 3 + 1 = 4, so 6 - 4 =
2
✔ Answer:
2
18.
□ + 5 + 2 = 9
→ 5 + 2 = 7, so 9 - 7 =
2
✔ Answer:
2
19.
2 + 2 + □ = 8
→ 2 + 2 = 4, so 8 - 4 =
4
✔ Answer:
4
20.
5 + 2 + □ = 10
→ 5 + 2 = 7, so 10 - 7 =
3
✔ Answer:
3
---
✔ Final Answers:
1. 2
2. 1
3. 2
4. 7
5. 3
6. 4
7. 0
8. 1
9. 3
10. 1
11. 5
12. 7
13. 1
14. 3
15. 3
16. 3
17. 2
18. 2
19. 4
20. 3
---
📝 Explanation:
Each problem involves simple addition with a missing addend. To find the missing number:
- Add the known numbers.
- Subtract that sum from the total.
- The result is the missing part.
This helps build foundational arithmetic skills and understanding of number relationships.
Let me know if you'd like this formatted as a printable answer key!
Parent Tip: Review the logic above to help your child master the concept of fun math pages.
