Let's solve each of these addition problems by finding the
missing addend (the number that makes the equation true). We'll go through them one by one.
---
1. 3 + ○ = 8
To find the missing number:
8 − 3 =
5
✔ So,
3 + 5 = 8
---
2. 8 + ○ = 10
10 − 8 =
2
✔ So,
8 + 2 = 10
---
3. ○ + 2 = 9
9 − 2 =
7
✔ So,
7 + 2 = 9
---
4. ○ + 3 = 6
6 − 3 =
3
✔ So,
3 + 3 = 6
---
5. 5 + ○ = 6
6 − 5 =
1
✔ So,
5 + 1 = 6
---
6. 2 + ○ = 4
4 − 2 =
2
✔ So,
2 + 2 = 4
---
7. 1 + ○ = 8
8 − 1 =
7
✔ So,
1 + 7 = 8
---
8. 5 + ○ = 9
9 − 5 =
4
✔ So,
5 + 4 = 9
---
9. ○ + 2 = 10
10 − 2 =
8
✔ So,
8 + 2 = 10
---
10. ○ + 4 = 4
4 − 4 =
0
✔ So,
0 + 4 = 4
---
11. 6 + ○ = 7
7 − 6 =
1
✔ So,
6 + 1 = 7
---
12. 7 + ○ = 8
8 − 7 =
1
✔ So,
7 + 1 = 8
---
✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 3 + ○ = 8 |
5 |
| 8 + ○ = 10 |
2 |
| ○ + 2 = 9 |
7 |
| ○ + 3 = 6 |
3 |
| 5 + ○ = 6 |
1 |
| 2 + ○ = 4 |
2 |
| 1 + ○ = 8 |
7 |
| 5 + ○ = 9 |
4 |
| ○ + 2 = 10 |
8 |
| ○ + 4 = 4 |
0 |
| 6 + ○ = 7 |
1 |
| 7 + ○ = 8 |
1 |
---
📝 Explanation:
To find the missing addend in an addition equation like
A + ○ = B, you subtract the known addend from the sum:
>
○ = B − A
This is a basic subtraction strategy used to solve for unknowns in addition facts up to 10.
Let me know if you'd like this printed or formatted as a worksheet!
Parent Tip: Review the logic above to help your child master the concept of class 1 maths worksheet.
