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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 179 · 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. 1.76 + ? = 100
  2. 2.85 + ? = 100
  3. 3.4 + ? = 10
  4. 4.41 + ? = 100
  5. 5.59 + ? = 100
  6. 6.6 + ? = 10
  7. 7.8 + ? = 10
  8. 8.49 + ? = 100
  9. 9.2 + ? = 10
  10. 10.53 + ? = 100
  11. 11.7 + ? = 10
  12. 12.64 + ? = 100
  13. 13.13 + ? = 100
  14. 14.84 + ? = 100
  15. 15.9 + ? = 10
  16. 16.15 + ? = 100
  17. 17.66 + ? = 100
  18. 18.48 + ? = 100
  19. 19.1 + ? = 10
  20. 20.31 + ? = 100
  21. 21.5 + ? = 10
  22. 22.80 + ? = 100
  23. 23.39 + ? = 100
  24. 24.23 + ? = 100
  25. 25.26 + ? = 100
  26. 26.19 + ? = 100
  27. 27.79 + ? = 100
  28. 28.78 + ? = 100
  29. 29.24 + ? = 100
  30. 30.47 + ? = 100
  31. 31.57 + ? = 100
  32. 32.83 + ? = 100
  33. 33.33 + ? = 100
  34. 34.40 + ? = 100
  35. 35.75 + ? = 100
  36. 36.42 + ? = 100
  37. 37.3 + ? = 10
  38. 38.65 + ? = 100
  39. 39.17 + ? = 100
  40. 40.54 + ? = 100

Answer key

  1. 24
  2. 15
  3. 6
  4. 59
  5. 41
  6. 4
  7. 2
  8. 51
  9. 8
  10. 47
  11. 3
  12. 36
  13. 87
  14. 16
  15. 1
  16. 85
  17. 34
  18. 52
  19. 9
  20. 69
  21. 5
  22. 20
  23. 61
  24. 77
  25. 74
  26. 81
  27. 21
  28. 22
  29. 76
  30. 53
  31. 43
  32. 17
  33. 67
  34. 60
  35. 25
  36. 58
  37. 7
  38. 35
  39. 83
  40. 46

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