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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 158 · 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. 1.78 + ? = 100
  2. 2.20 + ? = 100
  3. 3.75 + ? = 100
  4. 4.79 + ? = 100
  5. 5.3 + ? = 10
  6. 6.39 + ? = 100
  7. 7.1 + ? = 10
  8. 8.2 + ? = 10
  9. 9.8 + ? = 10
  10. 10.49 + ? = 100
  11. 11.47 + ? = 100
  12. 12.44 + ? = 100
  13. 13.83 + ? = 100
  14. 14.9 + ? = 10
  15. 15.43 + ? = 100
  16. 16.24 + ? = 100
  17. 17.6 + ? = 10
  18. 18.4 + ? = 10
  19. 19.71 + ? = 100
  20. 20.70 + ? = 100
  21. 21.7 + ? = 10
  22. 22.25 + ? = 100
  23. 23.89 + ? = 100
  24. 24.65 + ? = 100
  25. 25.17 + ? = 100
  26. 26.40 + ? = 100
  27. 27.26 + ? = 100
  28. 28.28 + ? = 100
  29. 29.64 + ? = 100
  30. 30.5 + ? = 10
  31. 31.16 + ? = 100
  32. 32.36 + ? = 100
  33. 33.66 + ? = 100
  34. 34.77 + ? = 100
  35. 35.42 + ? = 100
  36. 36.63 + ? = 100
  37. 37.54 + ? = 100
  38. 38.48 + ? = 100
  39. 39.34 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 22
  2. 80
  3. 25
  4. 21
  5. 7
  6. 61
  7. 9
  8. 8
  9. 2
  10. 51
  11. 53
  12. 56
  13. 17
  14. 1
  15. 57
  16. 76
  17. 4
  18. 6
  19. 29
  20. 30
  21. 3
  22. 75
  23. 11
  24. 35
  25. 83
  26. 60
  27. 74
  28. 72
  29. 36
  30. 5
  31. 84
  32. 64
  33. 34
  34. 23
  35. 58
  36. 37
  37. 46
  38. 52
  39. 66
  40. 67

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