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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 483 · 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. 1.81 + ? = 100
  2. 2.1 + ? = 10
  3. 3.7 + ? = 10
  4. 4.2 + ? = 10
  5. 5.33 + ? = 100
  6. 6.56 + ? = 100
  7. 7.37 + ? = 100
  8. 8.3 + ? = 10
  9. 9.49 + ? = 100
  10. 10.89 + ? = 100
  11. 11.20 + ? = 100
  12. 12.24 + ? = 100
  13. 13.59 + ? = 100
  14. 14.53 + ? = 100
  15. 15.6 + ? = 10
  16. 16.18 + ? = 100
  17. 17.76 + ? = 100
  18. 18.16 + ? = 100
  19. 19.17 + ? = 100
  20. 20.84 + ? = 100
  21. 21.45 + ? = 100
  22. 22.13 + ? = 100
  23. 23.82 + ? = 100
  24. 24.60 + ? = 100
  25. 25.5 + ? = 10
  26. 26.4 + ? = 10
  27. 27.79 + ? = 100
  28. 28.29 + ? = 100
  29. 29.64 + ? = 100
  30. 30.9 + ? = 10
  31. 31.48 + ? = 100
  32. 32.63 + ? = 100
  33. 33.36 + ? = 100
  34. 34.47 + ? = 100
  35. 35.8 + ? = 10
  36. 36.75 + ? = 100
  37. 37.87 + ? = 100
  38. 38.69 + ? = 100
  39. 39.25 + ? = 100
  40. 40.66 + ? = 100

Answer key

  1. 19
  2. 9
  3. 3
  4. 8
  5. 67
  6. 44
  7. 63
  8. 7
  9. 51
  10. 11
  11. 80
  12. 76
  13. 41
  14. 47
  15. 4
  16. 82
  17. 24
  18. 84
  19. 83
  20. 16
  21. 55
  22. 87
  23. 18
  24. 40
  25. 5
  26. 6
  27. 21
  28. 71
  29. 36
  30. 1
  31. 52
  32. 37
  33. 64
  34. 53
  35. 2
  36. 25
  37. 13
  38. 31
  39. 75
  40. 34

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