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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 679 · 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. 1.64 + ? = 100
  2. 2.39 + ? = 100
  3. 3.71 + ? = 100
  4. 4.18 + ? = 100
  5. 5.86 + ? = 100
  6. 6.3 + ? = 10
  7. 7.7 + ? = 10
  8. 8.69 + ? = 100
  9. 9.66 + ? = 100
  10. 10.5 + ? = 10
  11. 11.2 + ? = 10
  12. 12.1 + ? = 10
  13. 13.43 + ? = 100
  14. 14.81 + ? = 100
  15. 15.47 + ? = 100
  16. 16.9 + ? = 10
  17. 17.27 + ? = 100
  18. 18.42 + ? = 100
  19. 19.4 + ? = 10
  20. 20.83 + ? = 100
  21. 21.30 + ? = 100
  22. 22.24 + ? = 100
  23. 23.73 + ? = 100
  24. 24.8 + ? = 10
  25. 25.21 + ? = 100
  26. 26.40 + ? = 100
  27. 27.16 + ? = 100
  28. 28.36 + ? = 100
  29. 29.84 + ? = 100
  30. 30.85 + ? = 100
  31. 31.6 + ? = 10
  32. 32.26 + ? = 100
  33. 33.28 + ? = 100
  34. 34.89 + ? = 100
  35. 35.23 + ? = 100
  36. 36.78 + ? = 100
  37. 37.45 + ? = 100
  38. 38.35 + ? = 100
  39. 39.29 + ? = 100
  40. 40.77 + ? = 100

Answer key

  1. 36
  2. 61
  3. 29
  4. 82
  5. 14
  6. 7
  7. 3
  8. 31
  9. 34
  10. 5
  11. 8
  12. 9
  13. 57
  14. 19
  15. 53
  16. 1
  17. 73
  18. 58
  19. 6
  20. 17
  21. 70
  22. 76
  23. 27
  24. 2
  25. 79
  26. 60
  27. 84
  28. 64
  29. 16
  30. 15
  31. 4
  32. 74
  33. 72
  34. 11
  35. 77
  36. 22
  37. 55
  38. 65
  39. 71
  40. 23

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