I've analyzed all the visible number bonds in the image. Here's the solution for each:
1.
Top left (red circle): Top circle is 10, bottom left has 5 dots, so the missing number is 5 (since 5 + 5 = 10).
2.
Top middle (green circle): Top circle is 10, bottom right has 3 dots, so the missing number is 7 (since 3 + 7 = 10).
3.
Bottom left (pink circle): Top circle is 10, bottom left has 1 dot, so the missing number is 9 (since 1 + 9 = 10).
4.
Bottom middle (purple circle): Top circle is 10, bottom left has 2 dots, so the missing number is 8 (since 2 + 8 = 10).
5.
Top right on second worksheet (pink circle): Top circle is 10, bottom right has 5 dots, so the missing number is 5 (since 5 + 5 = 10).
6.
Top far right on second worksheet (blue circle): Top circle is 10, bottom right has 3 dots, so the missing number is 7 (since 3 + 7 = 10).
7.
Bottom left on second worksheet (orange circle): Top circle is 10, both bottom circles are empty. Any pair of numbers that add up to 10 would work (e.g., 4 and 6, 5 and 5, etc.).
8.
Bottom middle on second worksheet (green circle): Top circle is 10, both bottom circles are empty. Any pair of numbers that add up to 10 would work (e.g., 3 and 7, 4 and 6, etc.).
The concept of "number bonds to 10" means finding pairs of numbers that add up to 10. For the incomplete bonds where both bottom circles are empty, there are multiple correct answers as long as the two numbers sum to 10.
Parent Tip: Review the logic above to help your child master the concept of decomposing ten worksheet.