Let's solve each
number bond problem step by step.
In a number bond, the
total (the large circle) is the sum of the two smaller numbers connected to it. So:
>
Total = Part 1 + Part 2
We need to find the missing number in each bond using:
-
Addition if both parts are known (to get total),
-
Subtraction if one part and the total are known (to find the missing part).
---
🔹 Row 1
1.
16 → 8 and ?
$ 16 - 8 = 8 $ → Missing number:
8
2.
14 → ? and 12
$ 14 - 12 = 2 $ → Missing number:
2
3.
? → 8 and 12
$ 8 + 12 = 20 $ → Missing number:
20
---
🔹 Row 2
4.
? → 15 and 5
$ 15 + 5 = 20 $ → Missing number:
20
5.
? → 10 and 10
$ 10 + 10 = 20 $ → Missing number:
20
6.
13 → ? and 8
$ 13 - 8 = 5 $ → Missing number:
5
---
🔹 Row 3
7.
15 → 7 and ?
$ 15 - 7 = 8 $ → Missing number:
8
8.
? → 15 and 3
$ 15 + 3 = 18 $ → Missing number:
18
9.
16 → ? and 11
$ 16 - 11 = 5 $ → Missing number:
5
---
🔹 Row 4
10.
18 → 10 and ?
$ 18 - 10 = 8 $ → Missing number:
8
11.
12 → 6 and ?
$ 12 - 6 = 6 $ → Missing number:
6
12.
? → 14 and 6
$ 14 + 6 = 20 $ → Missing number:
20
---
✔ Final Answers (in order):
| Problem | Answer |
|--------|--------|
| 1 | 8 |
| 2 | 2 |
| 3 | 20 |
| 4 | 20 |
| 5 | 20 |
| 6 | 5 |
| 7 | 8 |
| 8 | 18 |
| 9 | 5 |
| 10 | 8 |
| 11 | 6 |
| 12 | 20 |
---
📝 Summary:
All missing numbers are found by either:
- Adding the two parts (if total is missing),
- Subtracting one part from the total (if one part is missing).
This helps build understanding of how numbers can be broken down into parts — a foundational skill for addition and subtraction.
Let me know if you'd like this formatted as a completed worksheet!
Parent Tip: Review the logic above to help your child master the concept of number bond worksheet kindergarten.
