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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 442 · 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. 1.37 + ? = 100
  2. 2.17 + ? = 100
  3. 3.25 + ? = 100
  4. 4.6 + ? = 10
  5. 5.44 + ? = 100
  6. 6.3 + ? = 10
  7. 7.9 + ? = 10
  8. 8.2 + ? = 10
  9. 9.47 + ? = 100
  10. 10.29 + ? = 100
  11. 11.38 + ? = 100
  12. 12.8 + ? = 10
  13. 13.5 + ? = 10
  14. 14.45 + ? = 100
  15. 15.66 + ? = 100
  16. 16.18 + ? = 100
  17. 17.12 + ? = 100
  18. 18.1 + ? = 10
  19. 19.7 + ? = 10
  20. 20.75 + ? = 100
  21. 21.16 + ? = 100
  22. 22.70 + ? = 100
  23. 23.4 + ? = 10
  24. 24.78 + ? = 100
  25. 25.20 + ? = 100
  26. 26.71 + ? = 100
  27. 27.65 + ? = 100
  28. 28.81 + ? = 100
  29. 29.62 + ? = 100
  30. 30.35 + ? = 100
  31. 31.69 + ? = 100
  32. 32.19 + ? = 100
  33. 33.34 + ? = 100
  34. 34.82 + ? = 100
  35. 35.39 + ? = 100
  36. 36.42 + ? = 100
  37. 37.13 + ? = 100
  38. 38.11 + ? = 100
  39. 39.52 + ? = 100
  40. 40.24 + ? = 100

Answer key

  1. 63
  2. 83
  3. 75
  4. 4
  5. 56
  6. 7
  7. 1
  8. 8
  9. 53
  10. 71
  11. 62
  12. 2
  13. 5
  14. 55
  15. 34
  16. 82
  17. 88
  18. 9
  19. 3
  20. 25
  21. 84
  22. 30
  23. 6
  24. 22
  25. 80
  26. 29
  27. 35
  28. 19
  29. 38
  30. 65
  31. 31
  32. 81
  33. 66
  34. 18
  35. 61
  36. 58
  37. 87
  38. 89
  39. 48
  40. 76

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