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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 631 · 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. 1.15 + ? = 100
  2. 2.14 + ? = 100
  3. 3.8 + ? = 10
  4. 4.82 + ? = 100
  5. 5.59 + ? = 100
  6. 6.25 + ? = 100
  7. 7.65 + ? = 100
  8. 8.2 + ? = 10
  9. 9.40 + ? = 100
  10. 10.4 + ? = 10
  11. 11.6 + ? = 10
  12. 12.1 + ? = 10
  13. 13.21 + ? = 100
  14. 14.9 + ? = 10
  15. 15.51 + ? = 100
  16. 16.5 + ? = 10
  17. 17.85 + ? = 100
  18. 18.3 + ? = 10
  19. 19.88 + ? = 100
  20. 20.23 + ? = 100
  21. 21.42 + ? = 100
  22. 22.17 + ? = 100
  23. 23.78 + ? = 100
  24. 24.79 + ? = 100
  25. 25.22 + ? = 100
  26. 26.24 + ? = 100
  27. 27.11 + ? = 100
  28. 28.83 + ? = 100
  29. 29.53 + ? = 100
  30. 30.75 + ? = 100
  31. 31.69 + ? = 100
  32. 32.45 + ? = 100
  33. 33.7 + ? = 10
  34. 34.19 + ? = 100
  35. 35.18 + ? = 100
  36. 36.35 + ? = 100
  37. 37.39 + ? = 100
  38. 38.72 + ? = 100
  39. 39.32 + ? = 100
  40. 40.61 + ? = 100

Answer key

  1. 85
  2. 86
  3. 2
  4. 18
  5. 41
  6. 75
  7. 35
  8. 8
  9. 60
  10. 6
  11. 4
  12. 9
  13. 79
  14. 1
  15. 49
  16. 5
  17. 15
  18. 7
  19. 12
  20. 77
  21. 58
  22. 83
  23. 22
  24. 21
  25. 78
  26. 76
  27. 89
  28. 17
  29. 47
  30. 25
  31. 31
  32. 55
  33. 3
  34. 81
  35. 82
  36. 65
  37. 61
  38. 28
  39. 68
  40. 39

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