Number Bonds by Tens worksheet for practicing addition to tens and multiples of ten.

I need to solve this number bonds worksheet. Let me work through each problem carefully.

Understanding the pattern:
Number bonds show how two numbers add up to make a target number. In this worksheet:
- The center circle shows the target sum (10, 20, 30, 40, etc.)
- Two outer circles show the parts that add together to make that sum
- I need to find the missing number in each bond

Let me solve each one:

Row 1 (target = 10):
1. 2 + ? = 10 → ? = 8
2. 3 + ? = 10 → ? = 7
3. ? + 5 = 10 → ? = 5
4. 4 + ? = 10 → ? = 6

Row 2:
5. 26 + ? = 30 → ? = 4
6. 17 + ? = 20 → ? = 3
7. 32 + ? = 40 → ? = 8
8. 41 + ? = 50 → ? = 9

Row 3:
9. 54 + ? = 60 → ? = 6
10. 63 + ? = 70 → ? = 7
11. 79 + ? = 80 → ? = 1
12. 85 + ? = 90 → ? = 5

Let me double-check my calculations:
- 2 + 8 = 10 ✓
- 3 + 7 = 10 ✓
- 5 + 5 = 10 ✓
- 4 + 6 = 10 ✓
- 26 + 4 = 30 ✓
- 17 + 3 = 20 ✓
- 32 + 8 = 40 ✓
- 41 + 9 = 50 ✓
- 54 + 6 = 60 ✓
- 63 + 7 = 70 ✓
- 79 + 1 = 80 ✓
- 85 + 5 = 90 ✓

All calculations are correct!

Final Answer:
The missing numbers are: 8, 7, 5, 6, 4, 3, 8, 9, 6, 7, 1, 5