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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 9 · 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. 1.14 + ? = 100
  2. 2.7 + ? = 10
  3. 3.37 + ? = 100
  4. 4.12 + ? = 100
  5. 5.9 + ? = 10
  6. 6.8 + ? = 10
  7. 7.25 + ? = 100
  8. 8.87 + ? = 100
  9. 9.13 + ? = 100
  10. 10.89 + ? = 100
  11. 11.2 + ? = 10
  12. 12.3 + ? = 10
  13. 13.63 + ? = 100
  14. 14.5 + ? = 10
  15. 15.23 + ? = 100
  16. 16.32 + ? = 100
  17. 17.41 + ? = 100
  18. 18.72 + ? = 100
  19. 19.31 + ? = 100
  20. 20.35 + ? = 100
  21. 21.80 + ? = 100
  22. 22.88 + ? = 100
  23. 23.1 + ? = 10
  24. 24.42 + ? = 100
  25. 25.76 + ? = 100
  26. 26.19 + ? = 100
  27. 27.64 + ? = 100
  28. 28.16 + ? = 100
  29. 29.47 + ? = 100
  30. 30.21 + ? = 100
  31. 31.4 + ? = 10
  32. 32.81 + ? = 100
  33. 33.84 + ? = 100
  34. 34.75 + ? = 100
  35. 35.60 + ? = 100
  36. 36.27 + ? = 100
  37. 37.66 + ? = 100
  38. 38.22 + ? = 100
  39. 39.68 + ? = 100
  40. 40.51 + ? = 100

Answer key

  1. 86
  2. 3
  3. 63
  4. 88
  5. 1
  6. 2
  7. 75
  8. 13
  9. 87
  10. 11
  11. 8
  12. 7
  13. 37
  14. 5
  15. 77
  16. 68
  17. 59
  18. 28
  19. 69
  20. 65
  21. 20
  22. 12
  23. 9
  24. 58
  25. 24
  26. 81
  27. 36
  28. 84
  29. 53
  30. 79
  31. 6
  32. 19
  33. 16
  34. 25
  35. 40
  36. 73
  37. 34
  38. 78
  39. 32
  40. 49

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