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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 105 · 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. 1.1 + ? = 10
  2. 2.4 + ? = 10
  3. 3.26 + ? = 100
  4. 4.2 + ? = 10
  5. 5.7 + ? = 10
  6. 6.42 + ? = 100
  7. 7.9 + ? = 10
  8. 8.6 + ? = 10
  9. 9.25 + ? = 100
  10. 10.3 + ? = 10
  11. 11.66 + ? = 100
  12. 12.60 + ? = 100
  13. 13.8 + ? = 10
  14. 14.24 + ? = 100
  15. 15.84 + ? = 100
  16. 16.41 + ? = 100
  17. 17.14 + ? = 100
  18. 18.70 + ? = 100
  19. 19.73 + ? = 100
  20. 20.31 + ? = 100
  21. 21.44 + ? = 100
  22. 22.82 + ? = 100
  23. 23.89 + ? = 100
  24. 24.74 + ? = 100
  25. 25.86 + ? = 100
  26. 26.68 + ? = 100
  27. 27.15 + ? = 100
  28. 28.5 + ? = 10
  29. 29.22 + ? = 100
  30. 30.21 + ? = 100
  31. 31.71 + ? = 100
  32. 32.30 + ? = 100
  33. 33.51 + ? = 100
  34. 34.17 + ? = 100
  35. 35.36 + ? = 100
  36. 36.76 + ? = 100
  37. 37.79 + ? = 100
  38. 38.11 + ? = 100
  39. 39.23 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 9
  2. 6
  3. 74
  4. 8
  5. 3
  6. 58
  7. 1
  8. 4
  9. 75
  10. 7
  11. 34
  12. 40
  13. 2
  14. 76
  15. 16
  16. 59
  17. 86
  18. 30
  19. 27
  20. 69
  21. 56
  22. 18
  23. 11
  24. 26
  25. 14
  26. 32
  27. 85
  28. 5
  29. 78
  30. 79
  31. 29
  32. 70
  33. 49
  34. 83
  35. 64
  36. 24
  37. 21
  38. 89
  39. 77
  40. 88

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