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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 285 · 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. 1.17 + ? = 100
  2. 2.2 + ? = 10
  3. 3.24 + ? = 100
  4. 4.48 + ? = 100
  5. 5.35 + ? = 100
  6. 6.9 + ? = 10
  7. 7.13 + ? = 100
  8. 8.33 + ? = 100
  9. 9.60 + ? = 100
  10. 10.68 + ? = 100
  11. 11.1 + ? = 10
  12. 12.83 + ? = 100
  13. 13.78 + ? = 100
  14. 14.8 + ? = 10
  15. 15.7 + ? = 10
  16. 16.6 + ? = 10
  17. 17.86 + ? = 100
  18. 18.18 + ? = 100
  19. 19.3 + ? = 10
  20. 20.52 + ? = 100
  21. 21.21 + ? = 100
  22. 22.85 + ? = 100
  23. 23.16 + ? = 100
  24. 24.23 + ? = 100
  25. 25.5 + ? = 10
  26. 26.82 + ? = 100
  27. 27.4 + ? = 10
  28. 28.56 + ? = 100
  29. 29.43 + ? = 100
  30. 30.79 + ? = 100
  31. 31.47 + ? = 100
  32. 32.76 + ? = 100
  33. 33.11 + ? = 100
  34. 34.61 + ? = 100
  35. 35.89 + ? = 100
  36. 36.77 + ? = 100
  37. 37.51 + ? = 100
  38. 38.12 + ? = 100
  39. 39.87 + ? = 100
  40. 40.34 + ? = 100

Answer key

  1. 83
  2. 8
  3. 76
  4. 52
  5. 65
  6. 1
  7. 87
  8. 67
  9. 40
  10. 32
  11. 9
  12. 17
  13. 22
  14. 2
  15. 3
  16. 4
  17. 14
  18. 82
  19. 7
  20. 48
  21. 79
  22. 15
  23. 84
  24. 77
  25. 5
  26. 18
  27. 6
  28. 44
  29. 57
  30. 21
  31. 53
  32. 24
  33. 89
  34. 39
  35. 11
  36. 23
  37. 49
  38. 88
  39. 13
  40. 66

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