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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 408 · 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. 1.18 + ? = 100
  2. 2.1 + ? = 10
  3. 3.43 + ? = 100
  4. 4.54 + ? = 100
  5. 5.55 + ? = 100
  6. 6.8 + ? = 10
  7. 7.61 + ? = 100
  8. 8.9 + ? = 10
  9. 9.83 + ? = 100
  10. 10.26 + ? = 100
  11. 11.3 + ? = 10
  12. 12.19 + ? = 100
  13. 13.88 + ? = 100
  14. 14.2 + ? = 10
  15. 15.46 + ? = 100
  16. 16.5 + ? = 10
  17. 17.14 + ? = 100
  18. 18.35 + ? = 100
  19. 19.56 + ? = 100
  20. 20.7 + ? = 10
  21. 21.11 + ? = 100
  22. 22.49 + ? = 100
  23. 23.59 + ? = 100
  24. 24.17 + ? = 100
  25. 25.24 + ? = 100
  26. 26.81 + ? = 100
  27. 27.44 + ? = 100
  28. 28.4 + ? = 10
  29. 29.39 + ? = 100
  30. 30.52 + ? = 100
  31. 31.12 + ? = 100
  32. 32.89 + ? = 100
  33. 33.50 + ? = 100
  34. 34.40 + ? = 100
  35. 35.42 + ? = 100
  36. 36.6 + ? = 10
  37. 37.21 + ? = 100
  38. 38.64 + ? = 100
  39. 39.57 + ? = 100
  40. 40.32 + ? = 100

Answer key

  1. 82
  2. 9
  3. 57
  4. 46
  5. 45
  6. 2
  7. 39
  8. 1
  9. 17
  10. 74
  11. 7
  12. 81
  13. 12
  14. 8
  15. 54
  16. 5
  17. 86
  18. 65
  19. 44
  20. 3
  21. 89
  22. 51
  23. 41
  24. 83
  25. 76
  26. 19
  27. 56
  28. 6
  29. 61
  30. 48
  31. 88
  32. 11
  33. 50
  34. 60
  35. 58
  36. 4
  37. 79
  38. 36
  39. 43
  40. 68

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