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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 502 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.13 + ? = 100
  2. 2.3 + ? = 10
  3. 3.32 + ? = 100
  4. 4.26 + ? = 100
  5. 5.7 + ? = 10
  6. 6.2 + ? = 10
  7. 7.30 + ? = 100
  8. 8.27 + ? = 100
  9. 9.9 + ? = 10
  10. 10.89 + ? = 100
  11. 11.8 + ? = 10
  12. 12.25 + ? = 100
  13. 13.4 + ? = 10
  14. 14.19 + ? = 100
  15. 15.51 + ? = 100
  16. 16.86 + ? = 100
  17. 17.5 + ? = 10
  18. 18.39 + ? = 100
  19. 19.17 + ? = 100
  20. 20.1 + ? = 10
  21. 21.36 + ? = 100
  22. 22.16 + ? = 100
  23. 23.6 + ? = 10
  24. 24.24 + ? = 100
  25. 25.21 + ? = 100
  26. 26.22 + ? = 100
  27. 27.59 + ? = 100
  28. 28.54 + ? = 100
  29. 29.83 + ? = 100
  30. 30.11 + ? = 100
  31. 31.43 + ? = 100
  32. 32.80 + ? = 100
  33. 33.49 + ? = 100
  34. 34.28 + ? = 100
  35. 35.82 + ? = 100
  36. 36.62 + ? = 100
  37. 37.23 + ? = 100
  38. 38.18 + ? = 100
  39. 39.88 + ? = 100
  40. 40.81 + ? = 100

Answer key

  1. 87
  2. 7
  3. 68
  4. 74
  5. 3
  6. 8
  7. 70
  8. 73
  9. 1
  10. 11
  11. 2
  12. 75
  13. 6
  14. 81
  15. 49
  16. 14
  17. 5
  18. 61
  19. 83
  20. 9
  21. 64
  22. 84
  23. 4
  24. 76
  25. 79
  26. 78
  27. 41
  28. 46
  29. 17
  30. 89
  31. 57
  32. 20
  33. 51
  34. 72
  35. 18
  36. 38
  37. 77
  38. 82
  39. 12
  40. 19

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