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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 512 · 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. 1.67 + ? = 100
  2. 2.41 + ? = 100
  3. 3.78 + ? = 100
  4. 4.2 + ? = 10
  5. 5.3 + ? = 10
  6. 6.6 + ? = 10
  7. 7.13 + ? = 100
  8. 8.81 + ? = 100
  9. 9.9 + ? = 10
  10. 10.57 + ? = 100
  11. 11.70 + ? = 100
  12. 12.71 + ? = 100
  13. 13.18 + ? = 100
  14. 14.65 + ? = 100
  15. 15.1 + ? = 10
  16. 16.60 + ? = 100
  17. 17.7 + ? = 10
  18. 18.43 + ? = 100
  19. 19.40 + ? = 100
  20. 20.22 + ? = 100
  21. 21.82 + ? = 100
  22. 22.47 + ? = 100
  23. 23.4 + ? = 10
  24. 24.5 + ? = 10
  25. 25.59 + ? = 100
  26. 26.29 + ? = 100
  27. 27.31 + ? = 100
  28. 28.80 + ? = 100
  29. 29.62 + ? = 100
  30. 30.8 + ? = 10
  31. 31.17 + ? = 100
  32. 32.53 + ? = 100
  33. 33.39 + ? = 100
  34. 34.21 + ? = 100
  35. 35.51 + ? = 100
  36. 36.24 + ? = 100
  37. 37.64 + ? = 100
  38. 38.73 + ? = 100
  39. 39.54 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 33
  2. 59
  3. 22
  4. 8
  5. 7
  6. 4
  7. 87
  8. 19
  9. 1
  10. 43
  11. 30
  12. 29
  13. 82
  14. 35
  15. 9
  16. 40
  17. 3
  18. 57
  19. 60
  20. 78
  21. 18
  22. 53
  23. 6
  24. 5
  25. 41
  26. 71
  27. 69
  28. 20
  29. 38
  30. 2
  31. 83
  32. 47
  33. 61
  34. 79
  35. 49
  36. 76
  37. 36
  38. 27
  39. 46
  40. 26

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