Let’s solve each problem one by one. We’re finding the missing number that, when added to the given number, equals 20.
We can think: “What do I add to this number to get 20?”
Or we can subtract: 20 minus the given number = the missing part.
---
First row:
1. ___ + 17 = 20 → 20 - 17 =
3
2. ___ + 11 = 20 → 20 - 11 =
9
Second row:
3. ___ + 12 = 20 → 20 - 12 =
8
4. ___ + 7 = 20 → 20 - 7 =
13
Third row:
5. ___ + 16 = 20 → 20 - 16 =
4
6. ___ + 14 = 20 → 20 - 14 =
6
Fourth row:
7. ___ + 13 = 20 → 20 - 13 =
7
8. ___ + 18 = 20 → 20 - 18 =
2
Fifth row:
9. ___ + 9 = 20 → 20 - 9 =
11
10. ___ + 15 = 20 → 20 - 15 =
5
Sixth row:
11. ___ + 19 = 20 → 20 - 19 =
1
12. ___ + 8 = 20 → 20 - 8 =
12
---
All answers checked by adding back to make sure they equal 20.
Final Answer:
3, 9, 8, 13, 4, 6, 7, 2, 11, 5, 1, 12
Parent Tip: Review the logic above to help your child master the concept of number bonds to 20 worksheet.
