Small practice. Bright discoveries.Explore the free starter collection
worksheetstudio.
Sign in
Back to worksheets
MathsAges 7-9

Number bonds

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

New variationTry interactive challengeBrowse templates
Age band:Ages 4-6Ages 7-9

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 7-9

Number bonds

Take your time. Show your thinking.

  1. 1. Find the missing number: 45 + ____ = 75

    45 · 75 · Number bonds

  2. 2. Find the missing number: 57 + ____ = 65

    57 · 65 · Number bonds

  3. 3. Find the missing number: 19 + ____ = 60

    19 · 60 · Number bonds

  4. 4. Find the missing number: 15 + ____ = 76

    15 · 76 · Number bonds

  5. 5. Find the missing number: 2 + ____ = 32

    2 · 32 · Number bonds

  6. 6. Find the missing number: 2 + ____ = 42

    2 · 42 · Number bonds

  7. 7. Find the missing number: 32 + ____ = 62

    32 · 62 · Number bonds

  8. 8. Find the missing number: 31 + ____ = 55

    31 · 55 · Number bonds

  9. 9. Find the missing number: 51 + ____ = 91

    51 · 91 · Number bonds

  10. 10. Find the missing number: 74 + ____ = 93

    74 · 93 · Number bonds

  11. 11. Find the missing number: 78 + ____ = 98

    78 · 98 · Number bonds

  12. 12. Find the missing number: 18 + ____ = 62

    18 · 62 · Number bonds
12 questions · Seed 52 · 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: 45 + ____ = 75

    30

    Subtract 45 from 75: 75 − 45 = 30. Check: 45 + 30 = 75.

  2. 2. Find the missing number: 57 + ____ = 65

    8

    Subtract 57 from 65: 65 − 57 = 8. Check: 57 + 8 = 65.

  3. 3. Find the missing number: 19 + ____ = 60

    41

    Subtract 19 from 60: 60 − 19 = 41. Check: 19 + 41 = 60.

  4. 4. Find the missing number: 15 + ____ = 76

    61

    Subtract 15 from 76: 76 − 15 = 61. Check: 15 + 61 = 76.

  5. 5. Find the missing number: 2 + ____ = 32

    30

    Subtract 2 from 32: 32 − 2 = 30. Check: 2 + 30 = 32.

  6. 6. Find the missing number: 2 + ____ = 42

    40

    Subtract 2 from 42: 42 − 2 = 40. Check: 2 + 40 = 42.

  7. 7. Find the missing number: 32 + ____ = 62

    30

    Subtract 32 from 62: 62 − 32 = 30. Check: 32 + 30 = 62.

  8. 8. Find the missing number: 31 + ____ = 55

    24

    Subtract 31 from 55: 55 − 31 = 24. Check: 31 + 24 = 55.

  9. 9. Find the missing number: 51 + ____ = 91

    40

    Subtract 51 from 91: 91 − 51 = 40. Check: 51 + 40 = 91.

  10. 10. Find the missing number: 74 + ____ = 93

    19

    Subtract 74 from 93: 93 − 74 = 19. Check: 74 + 19 = 93.

  11. 11. Find the missing number: 78 + ____ = 98

    20

    Subtract 78 from 98: 98 − 78 = 20. Check: 78 + 20 = 98.

  12. 12. Find the missing number: 18 + ____ = 62

    44

    Subtract 18 from 62: 62 − 18 = 44. Check: 18 + 44 = 62.

12 questions · Seed 52 · 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: 45 + ____ = 75

    45 · 75 · Number bonds

  2. 2. Find the missing number: 57 + ____ = 65

    57 · 65 · Number bonds

  3. 3. Find the missing number: 19 + ____ = 60

    19 · 60 · Number bonds

  4. 4. Find the missing number: 15 + ____ = 76

    15 · 76 · Number bonds

  5. 5. Find the missing number: 2 + ____ = 32

    2 · 32 · Number bonds

  6. 6. Find the missing number: 2 + ____ = 42

    2 · 42 · Number bonds

  7. 7. Find the missing number: 32 + ____ = 62

    32 · 62 · Number bonds

  8. 8. Find the missing number: 31 + ____ = 55

    31 · 55 · Number bonds

  9. 9. Find the missing number: 51 + ____ = 91

    51 · 91 · Number bonds

  10. 10. Find the missing number: 74 + ____ = 93

    74 · 93 · Number bonds

  11. 11. Find the missing number: 78 + ____ = 98

    78 · 98 · Number bonds

  12. 12. Find the missing number: 18 + ____ = 62

    18 · 62 · Number bonds
12 questions · Seed 52 · 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: 45 + ____ = 75

    30

    Subtract 45 from 75: 75 − 45 = 30. Check: 45 + 30 = 75.

  2. 2. Find the missing number: 57 + ____ = 65

    8

    Subtract 57 from 65: 65 − 57 = 8. Check: 57 + 8 = 65.

  3. 3. Find the missing number: 19 + ____ = 60

    41

    Subtract 19 from 60: 60 − 19 = 41. Check: 19 + 41 = 60.

  4. 4. Find the missing number: 15 + ____ = 76

    61

    Subtract 15 from 76: 76 − 15 = 61. Check: 15 + 61 = 76.

  5. 5. Find the missing number: 2 + ____ = 32

    30

    Subtract 2 from 32: 32 − 2 = 30. Check: 2 + 30 = 32.

  6. 6. Find the missing number: 2 + ____ = 42

    40

    Subtract 2 from 42: 42 − 2 = 40. Check: 2 + 40 = 42.

  7. 7. Find the missing number: 32 + ____ = 62

    30

    Subtract 32 from 62: 62 − 32 = 30. Check: 32 + 30 = 62.

  8. 8. Find the missing number: 31 + ____ = 55

    24

    Subtract 31 from 55: 55 − 31 = 24. Check: 31 + 24 = 55.

  9. 9. Find the missing number: 51 + ____ = 91

    40

    Subtract 51 from 91: 91 − 51 = 40. Check: 51 + 40 = 91.

  10. 10. Find the missing number: 74 + ____ = 93

    19

    Subtract 74 from 93: 93 − 74 = 19. Check: 74 + 19 = 93.

  11. 11. Find the missing number: 78 + ____ = 98

    20

    Subtract 78 from 98: 98 − 78 = 20. Check: 78 + 20 = 98.

  12. 12. Find the missing number: 18 + ____ = 62

    44

    Subtract 18 from 62: 62 − 18 = 44. Check: 18 + 44 = 62.

12 questions · Seed 52 · Age guidance, not curriculum certification