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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 619 · 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. 1.4 + ? = 10
  2. 2.39 + ? = 100
  3. 3.7 + ? = 10
  4. 4.6 + ? = 10
  5. 5.2 + ? = 10
  6. 6.9 + ? = 10
  7. 7.3 + ? = 10
  8. 8.1 + ? = 10
  9. 9.84 + ? = 100
  10. 10.29 + ? = 100
  11. 11.19 + ? = 100
  12. 12.85 + ? = 100
  13. 13.24 + ? = 100
  14. 14.59 + ? = 100
  15. 15.14 + ? = 100
  16. 16.37 + ? = 100
  17. 17.5 + ? = 10
  18. 18.13 + ? = 100
  19. 19.8 + ? = 10
  20. 20.42 + ? = 100
  21. 21.31 + ? = 100
  22. 22.17 + ? = 100
  23. 23.88 + ? = 100
  24. 24.73 + ? = 100
  25. 25.64 + ? = 100
  26. 26.82 + ? = 100
  27. 27.71 + ? = 100
  28. 28.70 + ? = 100
  29. 29.55 + ? = 100
  30. 30.47 + ? = 100
  31. 31.60 + ? = 100
  32. 32.89 + ? = 100
  33. 33.22 + ? = 100
  34. 34.33 + ? = 100
  35. 35.79 + ? = 100
  36. 36.74 + ? = 100
  37. 37.44 + ? = 100
  38. 38.25 + ? = 100
  39. 39.23 + ? = 100
  40. 40.81 + ? = 100

Answer key

  1. 6
  2. 61
  3. 3
  4. 4
  5. 8
  6. 1
  7. 7
  8. 9
  9. 16
  10. 71
  11. 81
  12. 15
  13. 76
  14. 41
  15. 86
  16. 63
  17. 5
  18. 87
  19. 2
  20. 58
  21. 69
  22. 83
  23. 12
  24. 27
  25. 36
  26. 18
  27. 29
  28. 30
  29. 45
  30. 53
  31. 40
  32. 11
  33. 78
  34. 67
  35. 21
  36. 26
  37. 56
  38. 75
  39. 77
  40. 19

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