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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 1 · 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. 1.73 + ? = 100
  2. 2.9 + ? = 10
  3. 3.66 + ? = 100
  4. 4.67 + ? = 100
  5. 5.41 + ? = 100
  6. 6.58 + ? = 100
  7. 7.6 + ? = 10
  8. 8.1 + ? = 10
  9. 9.2 + ? = 10
  10. 10.26 + ? = 100
  11. 11.81 + ? = 100
  12. 12.21 + ? = 100
  13. 13.47 + ? = 100
  14. 14.3 + ? = 10
  15. 15.52 + ? = 100
  16. 16.14 + ? = 100
  17. 17.5 + ? = 10
  18. 18.8 + ? = 10
  19. 19.71 + ? = 100
  20. 20.31 + ? = 100
  21. 21.39 + ? = 100
  22. 22.7 + ? = 10
  23. 23.4 + ? = 10
  24. 24.80 + ? = 100
  25. 25.59 + ? = 100
  26. 26.76 + ? = 100
  27. 27.27 + ? = 100
  28. 28.18 + ? = 100
  29. 29.83 + ? = 100
  30. 30.23 + ? = 100
  31. 31.25 + ? = 100
  32. 32.57 + ? = 100
  33. 33.28 + ? = 100
  34. 34.19 + ? = 100
  35. 35.38 + ? = 100
  36. 36.70 + ? = 100
  37. 37.17 + ? = 100
  38. 38.16 + ? = 100
  39. 39.65 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 27
  2. 1
  3. 34
  4. 33
  5. 59
  6. 42
  7. 4
  8. 9
  9. 8
  10. 74
  11. 19
  12. 79
  13. 53
  14. 7
  15. 48
  16. 86
  17. 5
  18. 2
  19. 29
  20. 69
  21. 61
  22. 3
  23. 6
  24. 20
  25. 41
  26. 24
  27. 73
  28. 82
  29. 17
  30. 77
  31. 75
  32. 43
  33. 72
  34. 81
  35. 62
  36. 30
  37. 83
  38. 84
  39. 35
  40. 88

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