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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 149 · 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. 1.24 + ? = 100
  2. 2.14 + ? = 100
  3. 3.2 + ? = 10
  4. 4.79 + ? = 100
  5. 5.7 + ? = 10
  6. 6.1 + ? = 10
  7. 7.80 + ? = 100
  8. 8.3 + ? = 10
  9. 9.15 + ? = 100
  10. 10.84 + ? = 100
  11. 11.73 + ? = 100
  12. 12.81 + ? = 100
  13. 13.11 + ? = 100
  14. 14.86 + ? = 100
  15. 15.8 + ? = 10
  16. 16.9 + ? = 10
  17. 17.46 + ? = 100
  18. 18.61 + ? = 100
  19. 19.70 + ? = 100
  20. 20.16 + ? = 100
  21. 21.32 + ? = 100
  22. 22.87 + ? = 100
  23. 23.75 + ? = 100
  24. 24.35 + ? = 100
  25. 25.21 + ? = 100
  26. 26.82 + ? = 100
  27. 27.69 + ? = 100
  28. 28.12 + ? = 100
  29. 29.4 + ? = 10
  30. 30.71 + ? = 100
  31. 31.6 + ? = 10
  32. 32.58 + ? = 100
  33. 33.5 + ? = 10
  34. 34.53 + ? = 100
  35. 35.42 + ? = 100
  36. 36.20 + ? = 100
  37. 37.78 + ? = 100
  38. 38.72 + ? = 100
  39. 39.26 + ? = 100
  40. 40.29 + ? = 100

Answer key

  1. 76
  2. 86
  3. 8
  4. 21
  5. 3
  6. 9
  7. 20
  8. 7
  9. 85
  10. 16
  11. 27
  12. 19
  13. 89
  14. 14
  15. 2
  16. 1
  17. 54
  18. 39
  19. 30
  20. 84
  21. 68
  22. 13
  23. 25
  24. 65
  25. 79
  26. 18
  27. 31
  28. 88
  29. 6
  30. 29
  31. 4
  32. 42
  33. 5
  34. 47
  35. 58
  36. 80
  37. 22
  38. 28
  39. 74
  40. 71

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