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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 230 · 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. 1.55 + ? = 100
  2. 2.6 + ? = 10
  3. 3.26 + ? = 100
  4. 4.42 + ? = 100
  5. 5.5 + ? = 10
  6. 6.1 + ? = 10
  7. 7.7 + ? = 10
  8. 8.31 + ? = 100
  9. 9.58 + ? = 100
  10. 10.4 + ? = 10
  11. 11.33 + ? = 100
  12. 12.3 + ? = 10
  13. 13.66 + ? = 100
  14. 14.27 + ? = 100
  15. 15.39 + ? = 100
  16. 16.43 + ? = 100
  17. 17.83 + ? = 100
  18. 18.78 + ? = 100
  19. 19.2 + ? = 10
  20. 20.54 + ? = 100
  21. 21.82 + ? = 100
  22. 22.59 + ? = 100
  23. 23.30 + ? = 100
  24. 24.8 + ? = 10
  25. 25.11 + ? = 100
  26. 26.40 + ? = 100
  27. 27.71 + ? = 100
  28. 28.18 + ? = 100
  29. 29.15 + ? = 100
  30. 30.85 + ? = 100
  31. 31.23 + ? = 100
  32. 32.60 + ? = 100
  33. 33.77 + ? = 100
  34. 34.84 + ? = 100
  35. 35.65 + ? = 100
  36. 36.37 + ? = 100
  37. 37.44 + ? = 100
  38. 38.17 + ? = 100
  39. 39.62 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 45
  2. 4
  3. 74
  4. 58
  5. 5
  6. 9
  7. 3
  8. 69
  9. 42
  10. 6
  11. 67
  12. 7
  13. 34
  14. 73
  15. 61
  16. 57
  17. 17
  18. 22
  19. 8
  20. 46
  21. 18
  22. 41
  23. 70
  24. 2
  25. 89
  26. 60
  27. 29
  28. 82
  29. 85
  30. 15
  31. 77
  32. 40
  33. 23
  34. 16
  35. 35
  36. 63
  37. 56
  38. 83
  39. 38
  40. 26

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