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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: 4 + ____ = 5
4 · 5 · Number bonds2. Find the missing number: 6 + ____ = 14
6 · 14 · Number bonds3. Find the missing number: 10 + ____ = 13
10 · 13 · Number bonds4. Find the missing number: 1 + ____ = 11
1 · 11 · Number bonds5. Find the missing number: 9 + ____ = 11
9 · 11 · Number bonds6. Find the missing number: 11 + ____ = 14
11 · 14 · Number bonds7. Find the missing number: 2 + ____ = 7
2 · 7 · Number bonds8. Find the missing number: 5 + ____ = 6
5 · 6 · Number bonds9. Find the missing number: 4 + ____ = 9
4 · 9 · Number bonds10. Find the missing number: 6 + ____ = 15
6 · 15 · Number bonds11. Find the missing number: 6 + ____ = 9
6 · 9 · Number bonds12. Find the missing number: 4 + ____ = 6
4 · 6 · Number bonds
12 questions · Seed 44 · 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: 4 + ____ = 5
1Subtract 4 from 5: 5 − 4 = 1. Check: 4 + 1 = 5.
2. Find the missing number: 6 + ____ = 14
8Subtract 6 from 14: 14 − 6 = 8. Check: 6 + 8 = 14.
3. Find the missing number: 10 + ____ = 13
3Subtract 10 from 13: 13 − 10 = 3. Check: 10 + 3 = 13.
4. Find the missing number: 1 + ____ = 11
10Subtract 1 from 11: 11 − 1 = 10. Check: 1 + 10 = 11.
5. Find the missing number: 9 + ____ = 11
2Subtract 9 from 11: 11 − 9 = 2. Check: 9 + 2 = 11.
6. Find the missing number: 11 + ____ = 14
3Subtract 11 from 14: 14 − 11 = 3. Check: 11 + 3 = 14.
7. Find the missing number: 2 + ____ = 7
5Subtract 2 from 7: 7 − 2 = 5. Check: 2 + 5 = 7.
8. Find the missing number: 5 + ____ = 6
1Subtract 5 from 6: 6 − 5 = 1. Check: 5 + 1 = 6.
9. Find the missing number: 4 + ____ = 9
5Subtract 4 from 9: 9 − 4 = 5. Check: 4 + 5 = 9.
10. Find the missing number: 6 + ____ = 15
9Subtract 6 from 15: 15 − 6 = 9. Check: 6 + 9 = 15.
11. Find the missing number: 6 + ____ = 9
3Subtract 6 from 9: 9 − 6 = 3. Check: 6 + 3 = 9.
12. Find the missing number: 4 + ____ = 6
2Subtract 4 from 6: 6 − 4 = 2. Check: 4 + 2 = 6.
12 questions · Seed 44 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 4-6
Number bonds
Take your time. Show your thinking.
1. Find the missing number: 4 + ____ = 5
4 · 5 · Number bonds2. Find the missing number: 6 + ____ = 14
6 · 14 · Number bonds3. Find the missing number: 10 + ____ = 13
10 · 13 · Number bonds4. Find the missing number: 1 + ____ = 11
1 · 11 · Number bonds5. Find the missing number: 9 + ____ = 11
9 · 11 · Number bonds6. Find the missing number: 11 + ____ = 14
11 · 14 · Number bonds7. Find the missing number: 2 + ____ = 7
2 · 7 · Number bonds8. Find the missing number: 5 + ____ = 6
5 · 6 · Number bonds9. Find the missing number: 4 + ____ = 9
4 · 9 · Number bonds10. Find the missing number: 6 + ____ = 15
6 · 15 · Number bonds11. Find the missing number: 6 + ____ = 9
6 · 9 · Number bonds12. Find the missing number: 4 + ____ = 6
4 · 6 · Number bonds
12 questions · Seed 44 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 4-6
Number bonds
Answers and reasoning. Review before teaching.
1. Find the missing number: 4 + ____ = 5
1Subtract 4 from 5: 5 − 4 = 1. Check: 4 + 1 = 5.
2. Find the missing number: 6 + ____ = 14
8Subtract 6 from 14: 14 − 6 = 8. Check: 6 + 8 = 14.
3. Find the missing number: 10 + ____ = 13
3Subtract 10 from 13: 13 − 10 = 3. Check: 10 + 3 = 13.
4. Find the missing number: 1 + ____ = 11
10Subtract 1 from 11: 11 − 1 = 10. Check: 1 + 10 = 11.
5. Find the missing number: 9 + ____ = 11
2Subtract 9 from 11: 11 − 9 = 2. Check: 9 + 2 = 11.
6. Find the missing number: 11 + ____ = 14
3Subtract 11 from 14: 14 − 11 = 3. Check: 11 + 3 = 14.
7. Find the missing number: 2 + ____ = 7
5Subtract 2 from 7: 7 − 2 = 5. Check: 2 + 5 = 7.
8. Find the missing number: 5 + ____ = 6
1Subtract 5 from 6: 6 − 5 = 1. Check: 5 + 1 = 6.
9. Find the missing number: 4 + ____ = 9
5Subtract 4 from 9: 9 − 4 = 5. Check: 4 + 5 = 9.
10. Find the missing number: 6 + ____ = 15
9Subtract 6 from 15: 15 − 6 = 9. Check: 6 + 9 = 15.
11. Find the missing number: 6 + ____ = 9
3Subtract 6 from 9: 9 − 6 = 3. Check: 6 + 3 = 9.
12. Find the missing number: 4 + ____ = 6
2Subtract 4 from 6: 6 − 4 = 2. Check: 4 + 2 = 6.
12 questions · Seed 44 · Age guidance, not curriculum certification