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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 643 · 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. 1.38 + ? = 100
  2. 2.7 + ? = 10
  3. 3.22 + ? = 100
  4. 4.21 + ? = 100
  5. 5.2 + ? = 10
  6. 6.17 + ? = 100
  7. 7.4 + ? = 10
  8. 8.49 + ? = 100
  9. 9.66 + ? = 100
  10. 10.57 + ? = 100
  11. 11.33 + ? = 100
  12. 12.3 + ? = 10
  13. 13.52 + ? = 100
  14. 14.1 + ? = 10
  15. 15.43 + ? = 100
  16. 16.8 + ? = 10
  17. 17.31 + ? = 100
  18. 18.86 + ? = 100
  19. 19.5 + ? = 10
  20. 20.87 + ? = 100
  21. 21.27 + ? = 100
  22. 22.9 + ? = 10
  23. 23.9 + ? = 10
  24. 24.64 + ? = 100
  25. 25.16 + ? = 100
  26. 26.58 + ? = 100
  27. 27.89 + ? = 100
  28. 28.42 + ? = 100
  29. 29.20 + ? = 100
  30. 30.15 + ? = 100
  31. 31.46 + ? = 100
  32. 32.32 + ? = 100
  33. 33.13 + ? = 100
  34. 34.11 + ? = 100
  35. 35.59 + ? = 100
  36. 36.37 + ? = 100
  37. 37.83 + ? = 100
  38. 38.24 + ? = 100
  39. 39.72 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 62
  2. 3
  3. 78
  4. 79
  5. 8
  6. 83
  7. 6
  8. 51
  9. 34
  10. 43
  11. 67
  12. 7
  13. 48
  14. 9
  15. 57
  16. 2
  17. 69
  18. 14
  19. 5
  20. 13
  21. 73
  22. 1
  23. 1
  24. 36
  25. 84
  26. 42
  27. 11
  28. 58
  29. 80
  30. 85
  31. 54
  32. 68
  33. 87
  34. 89
  35. 41
  36. 63
  37. 17
  38. 76
  39. 28
  40. 70

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