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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 297 · 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. 1.8 + ? = 10
  2. 2.15 + ? = 100
  3. 3.87 + ? = 100
  4. 4.43 + ? = 100
  5. 5.7 + ? = 10
  6. 6.4 + ? = 10
  7. 7.3 + ? = 10
  8. 8.66 + ? = 100
  9. 9.2 + ? = 10
  10. 10.44 + ? = 100
  11. 11.59 + ? = 100
  12. 12.83 + ? = 100
  13. 13.12 + ? = 100
  14. 14.81 + ? = 100
  15. 15.1 + ? = 10
  16. 16.11 + ? = 100
  17. 17.68 + ? = 100
  18. 18.5 + ? = 10
  19. 19.69 + ? = 100
  20. 20.39 + ? = 100
  21. 21.9 + ? = 10
  22. 22.86 + ? = 100
  23. 23.85 + ? = 100
  24. 24.64 + ? = 100
  25. 25.25 + ? = 100
  26. 26.20 + ? = 100
  27. 27.45 + ? = 100
  28. 28.29 + ? = 100
  29. 29.82 + ? = 100
  30. 30.18 + ? = 100
  31. 31.8 + ? = 10
  32. 32.65 + ? = 100
  33. 33.63 + ? = 100
  34. 34.56 + ? = 100
  35. 35.32 + ? = 100
  36. 36.77 + ? = 100
  37. 37.51 + ? = 100
  38. 38.14 + ? = 100
  39. 39.47 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 2
  2. 85
  3. 13
  4. 57
  5. 3
  6. 6
  7. 7
  8. 34
  9. 8
  10. 56
  11. 41
  12. 17
  13. 88
  14. 19
  15. 9
  16. 89
  17. 32
  18. 5
  19. 31
  20. 61
  21. 1
  22. 14
  23. 15
  24. 36
  25. 75
  26. 80
  27. 55
  28. 71
  29. 18
  30. 82
  31. 2
  32. 35
  33. 37
  34. 44
  35. 68
  36. 23
  37. 49
  38. 86
  39. 53
  40. 70

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