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Number bonds
Find the missing addend that completes a target whole number. Review suitability for your learners before teaching.
Worksheet StudioPractice pack · Ages 4-6
Number bonds
Take your time. Show your thinking.
1. Find the missing number: 9 + ____ = 13
9 · 13 · Number bonds2. Find the missing number: 1 + ____ = 6
1 · 6 · Number bonds3. Find the missing number: 8 + ____ = 10
8 · 10 · Number bonds4. Find the missing number: 4 + ____ = 12
4 · 12 · Number bonds5. Find the missing number: 4 + ____ = 7
4 · 7 · Number bonds6. Find the missing number: 4 + ____ = 9
4 · 9 · Number bonds7. Find the missing number: 6 + ____ = 7
6 · 7 · Number bonds8. Find the missing number: 2 + ____ = 5
2 · 5 · Number bonds9. Find the missing number: 2 + ____ = 12
2 · 12 · Number bonds10. Find the missing number: 3 + ____ = 11
3 · 11 · Number bonds11. Find the missing number: 1 + ____ = 5
1 · 5 · Number bonds12. Find the missing number: 6 + ____ = 9
6 · 9 · Number bonds
12 questions · Seed 47 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 4-6
Number bonds
Answers and reasoning. Review before teaching.
1. Find the missing number: 9 + ____ = 13
4Subtract 9 from 13: 13 − 9 = 4. Check: 9 + 4 = 13.
2. Find the missing number: 1 + ____ = 6
5Subtract 1 from 6: 6 − 1 = 5. Check: 1 + 5 = 6.
3. Find the missing number: 8 + ____ = 10
2Subtract 8 from 10: 10 − 8 = 2. Check: 8 + 2 = 10.
4. Find the missing number: 4 + ____ = 12
8Subtract 4 from 12: 12 − 4 = 8. Check: 4 + 8 = 12.
5. Find the missing number: 4 + ____ = 7
3Subtract 4 from 7: 7 − 4 = 3. Check: 4 + 3 = 7.
6. Find the missing number: 4 + ____ = 9
5Subtract 4 from 9: 9 − 4 = 5. Check: 4 + 5 = 9.
7. Find the missing number: 6 + ____ = 7
1Subtract 6 from 7: 7 − 6 = 1. Check: 6 + 1 = 7.
8. Find the missing number: 2 + ____ = 5
3Subtract 2 from 5: 5 − 2 = 3. Check: 2 + 3 = 5.
9. Find the missing number: 2 + ____ = 12
10Subtract 2 from 12: 12 − 2 = 10. Check: 2 + 10 = 12.
10. Find the missing number: 3 + ____ = 11
8Subtract 3 from 11: 11 − 3 = 8. Check: 3 + 8 = 11.
11. Find the missing number: 1 + ____ = 5
4Subtract 1 from 5: 5 − 1 = 4. Check: 1 + 4 = 5.
12. Find the missing number: 6 + ____ = 9
3Subtract 6 from 9: 9 − 6 = 3. Check: 6 + 3 = 9.
12 questions · Seed 47 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 4-6
Number bonds
Take your time. Show your thinking.
1. Find the missing number: 9 + ____ = 13
9 · 13 · Number bonds2. Find the missing number: 1 + ____ = 6
1 · 6 · Number bonds3. Find the missing number: 8 + ____ = 10
8 · 10 · Number bonds4. Find the missing number: 4 + ____ = 12
4 · 12 · Number bonds5. Find the missing number: 4 + ____ = 7
4 · 7 · Number bonds6. Find the missing number: 4 + ____ = 9
4 · 9 · Number bonds7. Find the missing number: 6 + ____ = 7
6 · 7 · Number bonds8. Find the missing number: 2 + ____ = 5
2 · 5 · Number bonds9. Find the missing number: 2 + ____ = 12
2 · 12 · Number bonds10. Find the missing number: 3 + ____ = 11
3 · 11 · Number bonds11. Find the missing number: 1 + ____ = 5
1 · 5 · Number bonds12. Find the missing number: 6 + ____ = 9
6 · 9 · Number bonds
12 questions · Seed 47 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 4-6
Number bonds
Answers and reasoning. Review before teaching.
1. Find the missing number: 9 + ____ = 13
4Subtract 9 from 13: 13 − 9 = 4. Check: 9 + 4 = 13.
2. Find the missing number: 1 + ____ = 6
5Subtract 1 from 6: 6 − 1 = 5. Check: 1 + 5 = 6.
3. Find the missing number: 8 + ____ = 10
2Subtract 8 from 10: 10 − 8 = 2. Check: 8 + 2 = 10.
4. Find the missing number: 4 + ____ = 12
8Subtract 4 from 12: 12 − 4 = 8. Check: 4 + 8 = 12.
5. Find the missing number: 4 + ____ = 7
3Subtract 4 from 7: 7 − 4 = 3. Check: 4 + 3 = 7.
6. Find the missing number: 4 + ____ = 9
5Subtract 4 from 9: 9 − 4 = 5. Check: 4 + 5 = 9.
7. Find the missing number: 6 + ____ = 7
1Subtract 6 from 7: 7 − 6 = 1. Check: 6 + 1 = 7.
8. Find the missing number: 2 + ____ = 5
3Subtract 2 from 5: 5 − 2 = 3. Check: 2 + 3 = 5.
9. Find the missing number: 2 + ____ = 12
10Subtract 2 from 12: 12 − 2 = 10. Check: 2 + 10 = 12.
10. Find the missing number: 3 + ____ = 11
8Subtract 3 from 11: 11 − 3 = 8. Check: 3 + 8 = 11.
11. Find the missing number: 1 + ____ = 5
4Subtract 1 from 5: 5 − 1 = 4. Check: 1 + 4 = 5.
12. Find the missing number: 6 + ____ = 9
3Subtract 6 from 9: 9 − 6 = 3. Check: 6 + 3 = 9.
12 questions · Seed 47 · Age guidance, not curriculum certification