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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 495 · 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. 1.52 + ? = 100
  2. 2.3 + ? = 10
  3. 3.2 + ? = 10
  4. 4.8 + ? = 10
  5. 5.59 + ? = 100
  6. 6.9 + ? = 10
  7. 7.6 + ? = 10
  8. 8.32 + ? = 100
  9. 9.20 + ? = 100
  10. 10.27 + ? = 100
  11. 11.57 + ? = 100
  12. 12.77 + ? = 100
  13. 13.61 + ? = 100
  14. 14.26 + ? = 100
  15. 15.4 + ? = 10
  16. 16.22 + ? = 100
  17. 17.24 + ? = 100
  18. 18.1 + ? = 10
  19. 19.63 + ? = 100
  20. 20.69 + ? = 100
  21. 21.15 + ? = 100
  22. 22.25 + ? = 100
  23. 23.67 + ? = 100
  24. 24.39 + ? = 100
  25. 25.13 + ? = 100
  26. 26.54 + ? = 100
  27. 27.11 + ? = 100
  28. 28.42 + ? = 100
  29. 29.72 + ? = 100
  30. 30.35 + ? = 100
  31. 31.86 + ? = 100
  32. 32.5 + ? = 10
  33. 33.7 + ? = 10
  34. 34.70 + ? = 100
  35. 35.46 + ? = 100
  36. 36.89 + ? = 100
  37. 37.81 + ? = 100
  38. 38.37 + ? = 100
  39. 39.74 + ? = 100
  40. 40.16 + ? = 100

Answer key

  1. 48
  2. 7
  3. 8
  4. 2
  5. 41
  6. 1
  7. 4
  8. 68
  9. 80
  10. 73
  11. 43
  12. 23
  13. 39
  14. 74
  15. 6
  16. 78
  17. 76
  18. 9
  19. 37
  20. 31
  21. 85
  22. 75
  23. 33
  24. 61
  25. 87
  26. 46
  27. 89
  28. 58
  29. 28
  30. 65
  31. 14
  32. 5
  33. 3
  34. 30
  35. 54
  36. 11
  37. 19
  38. 63
  39. 26
  40. 84

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