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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 922 · 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. 1.16 + ? = 100
  2. 2.84 + ? = 100
  3. 3.7 + ? = 10
  4. 4.13 + ? = 100
  5. 5.54 + ? = 100
  6. 6.1 + ? = 10
  7. 7.32 + ? = 100
  8. 8.59 + ? = 100
  9. 9.6 + ? = 10
  10. 10.2 + ? = 10
  11. 11.65 + ? = 100
  12. 12.5 + ? = 10
  13. 13.70 + ? = 100
  14. 14.89 + ? = 100
  15. 15.3 + ? = 10
  16. 16.8 + ? = 10
  17. 17.40 + ? = 100
  18. 18.9 + ? = 10
  19. 19.75 + ? = 100
  20. 20.24 + ? = 100
  21. 21.42 + ? = 100
  22. 22.18 + ? = 100
  23. 23.4 + ? = 10
  24. 24.82 + ? = 100
  25. 25.49 + ? = 100
  26. 26.77 + ? = 100
  27. 27.19 + ? = 100
  28. 28.39 + ? = 100
  29. 29.26 + ? = 100
  30. 30.87 + ? = 100
  31. 31.60 + ? = 100
  32. 32.37 + ? = 100
  33. 33.64 + ? = 100
  34. 34.53 + ? = 100
  35. 35.34 + ? = 100
  36. 36.81 + ? = 100
  37. 37.83 + ? = 100
  38. 38.52 + ? = 100
  39. 39.85 + ? = 100
  40. 40.36 + ? = 100

Answer key

  1. 84
  2. 16
  3. 3
  4. 87
  5. 46
  6. 9
  7. 68
  8. 41
  9. 4
  10. 8
  11. 35
  12. 5
  13. 30
  14. 11
  15. 7
  16. 2
  17. 60
  18. 1
  19. 25
  20. 76
  21. 58
  22. 82
  23. 6
  24. 18
  25. 51
  26. 23
  27. 81
  28. 61
  29. 74
  30. 13
  31. 40
  32. 63
  33. 36
  34. 47
  35. 66
  36. 19
  37. 17
  38. 48
  39. 15
  40. 64

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