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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 453 · 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. 1.9 + ? = 10
  2. 2.11 + ? = 100
  3. 3.21 + ? = 100
  4. 4.6 + ? = 10
  5. 5.2 + ? = 10
  6. 6.3 + ? = 10
  7. 7.23 + ? = 100
  8. 8.1 + ? = 10
  9. 9.5 + ? = 10
  10. 10.15 + ? = 100
  11. 11.8 + ? = 10
  12. 12.56 + ? = 100
  13. 13.17 + ? = 100
  14. 14.71 + ? = 100
  15. 15.42 + ? = 100
  16. 16.33 + ? = 100
  17. 17.25 + ? = 100
  18. 18.72 + ? = 100
  19. 19.29 + ? = 100
  20. 20.28 + ? = 100
  21. 21.26 + ? = 100
  22. 22.19 + ? = 100
  23. 23.65 + ? = 100
  24. 24.60 + ? = 100
  25. 25.87 + ? = 100
  26. 26.41 + ? = 100
  27. 27.66 + ? = 100
  28. 28.14 + ? = 100
  29. 29.31 + ? = 100
  30. 30.48 + ? = 100
  31. 31.75 + ? = 100
  32. 32.43 + ? = 100
  33. 33.4 + ? = 10
  34. 34.82 + ? = 100
  35. 35.53 + ? = 100
  36. 36.83 + ? = 100
  37. 37.55 + ? = 100
  38. 38.63 + ? = 100
  39. 39.24 + ? = 100
  40. 40.7 + ? = 10

Answer key

  1. 1
  2. 89
  3. 79
  4. 4
  5. 8
  6. 7
  7. 77
  8. 9
  9. 5
  10. 85
  11. 2
  12. 44
  13. 83
  14. 29
  15. 58
  16. 67
  17. 75
  18. 28
  19. 71
  20. 72
  21. 74
  22. 81
  23. 35
  24. 40
  25. 13
  26. 59
  27. 34
  28. 86
  29. 69
  30. 52
  31. 25
  32. 57
  33. 6
  34. 18
  35. 47
  36. 17
  37. 45
  38. 37
  39. 76
  40. 3

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