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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 504 · 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. 1.12 + ? = 100
  2. 2.3 + ? = 10
  3. 3.82 + ? = 100
  4. 4.47 + ? = 100
  5. 5.9 + ? = 10
  6. 6.80 + ? = 100
  7. 7.1 + ? = 10
  8. 8.48 + ? = 100
  9. 9.11 + ? = 100
  10. 10.7 + ? = 10
  11. 11.22 + ? = 100
  12. 12.73 + ? = 100
  13. 13.75 + ? = 100
  14. 14.4 + ? = 10
  15. 15.65 + ? = 100
  16. 16.34 + ? = 100
  17. 17.6 + ? = 10
  18. 18.77 + ? = 100
  19. 19.2 + ? = 10
  20. 20.86 + ? = 100
  21. 21.14 + ? = 100
  22. 22.23 + ? = 100
  23. 23.81 + ? = 100
  24. 24.17 + ? = 100
  25. 25.8 + ? = 10
  26. 26.5 + ? = 10
  27. 27.78 + ? = 100
  28. 28.52 + ? = 100
  29. 29.19 + ? = 100
  30. 30.88 + ? = 100
  31. 31.83 + ? = 100
  32. 32.55 + ? = 100
  33. 33.64 + ? = 100
  34. 34.61 + ? = 100
  35. 35.25 + ? = 100
  36. 36.70 + ? = 100
  37. 37.38 + ? = 100
  38. 38.27 + ? = 100
  39. 39.32 + ? = 100
  40. 40.62 + ? = 100

Answer key

  1. 88
  2. 7
  3. 18
  4. 53
  5. 1
  6. 20
  7. 9
  8. 52
  9. 89
  10. 3
  11. 78
  12. 27
  13. 25
  14. 6
  15. 35
  16. 66
  17. 4
  18. 23
  19. 8
  20. 14
  21. 86
  22. 77
  23. 19
  24. 83
  25. 2
  26. 5
  27. 22
  28. 48
  29. 81
  30. 12
  31. 17
  32. 45
  33. 36
  34. 39
  35. 75
  36. 30
  37. 62
  38. 73
  39. 68
  40. 38

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