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MathsAges 7-9

Number bonds

Find the missing addend that completes a target whole number. Review suitability for your learners before teaching.

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Age band:Ages 4-6Ages 7-9

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Worksheet StudioPractice pack · Ages 7-9

Number bonds

Take your time. Show your thinking.

  1. 1. Find the missing number: 20 + ____ = 21

    20 · 21 · Number bonds

  2. 2. Find the missing number: 40 + ____ = 92

    40 · 92 · Number bonds

  3. 3. Find the missing number: 60 + ____ = 80

    60 · 80 · Number bonds

  4. 4. Find the missing number: 6 + ____ = 68

    6 · 68 · Number bonds

  5. 5. Find the missing number: 55 + ____ = 64

    55 · 64 · Number bonds

  6. 6. Find the missing number: 70 + ____ = 90

    70 · 90 · Number bonds

  7. 7. Find the missing number: 11 + ____ = 40

    11 · 40 · Number bonds

  8. 8. Find the missing number: 28 + ____ = 34

    28 · 34 · Number bonds

  9. 9. Find the missing number: 22 + ____ = 55

    22 · 55 · Number bonds

  10. 10. Find the missing number: 39 + ____ = 98

    39 · 98 · Number bonds

  11. 11. Find the missing number: 55 + ____ = 68

    55 · 68 · Number bonds

  12. 12. Find the missing number: 36 + ____ = 51

    36 · 51 · Number bonds
12 questions · Seed 44 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9

Number bonds

Answers and reasoning. Review before teaching.

  1. 1. Find the missing number: 20 + ____ = 21

    1

    Subtract 20 from 21: 21 − 20 = 1. Check: 20 + 1 = 21.

  2. 2. Find the missing number: 40 + ____ = 92

    52

    Subtract 40 from 92: 92 − 40 = 52. Check: 40 + 52 = 92.

  3. 3. Find the missing number: 60 + ____ = 80

    20

    Subtract 60 from 80: 80 − 60 = 20. Check: 60 + 20 = 80.

  4. 4. Find the missing number: 6 + ____ = 68

    62

    Subtract 6 from 68: 68 − 6 = 62. Check: 6 + 62 = 68.

  5. 5. Find the missing number: 55 + ____ = 64

    9

    Subtract 55 from 64: 64 − 55 = 9. Check: 55 + 9 = 64.

  6. 6. Find the missing number: 70 + ____ = 90

    20

    Subtract 70 from 90: 90 − 70 = 20. Check: 70 + 20 = 90.

  7. 7. Find the missing number: 11 + ____ = 40

    29

    Subtract 11 from 40: 40 − 11 = 29. Check: 11 + 29 = 40.

  8. 8. Find the missing number: 28 + ____ = 34

    6

    Subtract 28 from 34: 34 − 28 = 6. Check: 28 + 6 = 34.

  9. 9. Find the missing number: 22 + ____ = 55

    33

    Subtract 22 from 55: 55 − 22 = 33. Check: 22 + 33 = 55.

  10. 10. Find the missing number: 39 + ____ = 98

    59

    Subtract 39 from 98: 98 − 39 = 59. Check: 39 + 59 = 98.

  11. 11. Find the missing number: 55 + ____ = 68

    13

    Subtract 55 from 68: 68 − 55 = 13. Check: 55 + 13 = 68.

  12. 12. Find the missing number: 36 + ____ = 51

    15

    Subtract 36 from 51: 51 − 36 = 15. Check: 36 + 15 = 51.

12 questions · Seed 44 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9

Number bonds

Take your time. Show your thinking.

  1. 1. Find the missing number: 20 + ____ = 21

    20 · 21 · Number bonds

  2. 2. Find the missing number: 40 + ____ = 92

    40 · 92 · Number bonds

  3. 3. Find the missing number: 60 + ____ = 80

    60 · 80 · Number bonds

  4. 4. Find the missing number: 6 + ____ = 68

    6 · 68 · Number bonds

  5. 5. Find the missing number: 55 + ____ = 64

    55 · 64 · Number bonds

  6. 6. Find the missing number: 70 + ____ = 90

    70 · 90 · Number bonds

  7. 7. Find the missing number: 11 + ____ = 40

    11 · 40 · Number bonds

  8. 8. Find the missing number: 28 + ____ = 34

    28 · 34 · Number bonds

  9. 9. Find the missing number: 22 + ____ = 55

    22 · 55 · Number bonds

  10. 10. Find the missing number: 39 + ____ = 98

    39 · 98 · Number bonds

  11. 11. Find the missing number: 55 + ____ = 68

    55 · 68 · Number bonds

  12. 12. Find the missing number: 36 + ____ = 51

    36 · 51 · Number bonds
12 questions · Seed 44 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9

Number bonds

Answers and reasoning. Review before teaching.

  1. 1. Find the missing number: 20 + ____ = 21

    1

    Subtract 20 from 21: 21 − 20 = 1. Check: 20 + 1 = 21.

  2. 2. Find the missing number: 40 + ____ = 92

    52

    Subtract 40 from 92: 92 − 40 = 52. Check: 40 + 52 = 92.

  3. 3. Find the missing number: 60 + ____ = 80

    20

    Subtract 60 from 80: 80 − 60 = 20. Check: 60 + 20 = 80.

  4. 4. Find the missing number: 6 + ____ = 68

    62

    Subtract 6 from 68: 68 − 6 = 62. Check: 6 + 62 = 68.

  5. 5. Find the missing number: 55 + ____ = 64

    9

    Subtract 55 from 64: 64 − 55 = 9. Check: 55 + 9 = 64.

  6. 6. Find the missing number: 70 + ____ = 90

    20

    Subtract 70 from 90: 90 − 70 = 20. Check: 70 + 20 = 90.

  7. 7. Find the missing number: 11 + ____ = 40

    29

    Subtract 11 from 40: 40 − 11 = 29. Check: 11 + 29 = 40.

  8. 8. Find the missing number: 28 + ____ = 34

    6

    Subtract 28 from 34: 34 − 28 = 6. Check: 28 + 6 = 34.

  9. 9. Find the missing number: 22 + ____ = 55

    33

    Subtract 22 from 55: 55 − 22 = 33. Check: 22 + 33 = 55.

  10. 10. Find the missing number: 39 + ____ = 98

    59

    Subtract 39 from 98: 98 − 39 = 59. Check: 39 + 59 = 98.

  11. 11. Find the missing number: 55 + ____ = 68

    13

    Subtract 55 from 68: 68 − 55 = 13. Check: 55 + 13 = 68.

  12. 12. Find the missing number: 36 + ____ = 51

    15

    Subtract 36 from 51: 51 − 36 = 15. Check: 36 + 15 = 51.

12 questions · Seed 44 · Age guidance, not curriculum certification