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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 599 · 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. 2.4 + ? = 10
  3. 3.7 + ? = 10
  4. 4.1 + ? = 10
  5. 5.49 + ? = 100
  6. 6.86 + ? = 100
  7. 7.21 + ? = 100
  8. 8.71 + ? = 100
  9. 9.29 + ? = 100
  10. 10.12 + ? = 100
  11. 11.6 + ? = 10
  12. 12.8 + ? = 10
  13. 13.31 + ? = 100
  14. 14.20 + ? = 100
  15. 15.27 + ? = 100
  16. 16.78 + ? = 100
  17. 17.83 + ? = 100
  18. 18.89 + ? = 100
  19. 19.5 + ? = 10
  20. 20.43 + ? = 100
  21. 21.76 + ? = 100
  22. 22.15 + ? = 100
  23. 23.46 + ? = 100
  24. 24.2 + ? = 10
  25. 25.57 + ? = 100
  26. 26.44 + ? = 100
  27. 27.39 + ? = 100
  28. 28.19 + ? = 100
  29. 29.81 + ? = 100
  30. 30.9 + ? = 10
  31. 31.79 + ? = 100
  32. 32.41 + ? = 100
  33. 33.25 + ? = 100
  34. 34.52 + ? = 100
  35. 35.82 + ? = 100
  36. 36.24 + ? = 100
  37. 37.84 + ? = 100
  38. 38.48 + ? = 100
  39. 39.72 + ? = 100
  40. 40.87 + ? = 100

Answer key

  1. 86
  2. 6
  3. 3
  4. 9
  5. 51
  6. 14
  7. 79
  8. 29
  9. 71
  10. 88
  11. 4
  12. 2
  13. 69
  14. 80
  15. 73
  16. 22
  17. 17
  18. 11
  19. 5
  20. 57
  21. 24
  22. 85
  23. 54
  24. 8
  25. 43
  26. 56
  27. 61
  28. 81
  29. 19
  30. 1
  31. 21
  32. 59
  33. 75
  34. 48
  35. 18
  36. 76
  37. 16
  38. 52
  39. 28
  40. 13

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