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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 13 · 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. 1.65 + ? = 100
  2. 2.5 + ? = 10
  3. 3.38 + ? = 100
  4. 4.14 + ? = 100
  5. 5.1 + ? = 10
  6. 6.55 + ? = 100
  7. 7.4 + ? = 10
  8. 8.43 + ? = 100
  9. 9.7 + ? = 10
  10. 10.25 + ? = 100
  11. 11.22 + ? = 100
  12. 12.12 + ? = 100
  13. 13.41 + ? = 100
  14. 14.8 + ? = 10
  15. 15.2 + ? = 10
  16. 16.3 + ? = 10
  17. 17.9 + ? = 10
  18. 18.73 + ? = 100
  19. 19.34 + ? = 100
  20. 20.46 + ? = 100
  21. 21.75 + ? = 100
  22. 22.84 + ? = 100
  23. 23.28 + ? = 100
  24. 24.23 + ? = 100
  25. 25.62 + ? = 100
  26. 26.18 + ? = 100
  27. 27.42 + ? = 100
  28. 28.29 + ? = 100
  29. 29.82 + ? = 100
  30. 30.83 + ? = 100
  31. 31.33 + ? = 100
  32. 32.85 + ? = 100
  33. 33.89 + ? = 100
  34. 34.52 + ? = 100
  35. 35.66 + ? = 100
  36. 36.11 + ? = 100
  37. 37.27 + ? = 100
  38. 38.87 + ? = 100
  39. 39.54 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 35
  2. 5
  3. 62
  4. 86
  5. 9
  6. 45
  7. 6
  8. 57
  9. 3
  10. 75
  11. 78
  12. 88
  13. 59
  14. 2
  15. 8
  16. 7
  17. 1
  18. 27
  19. 66
  20. 54
  21. 25
  22. 16
  23. 72
  24. 77
  25. 38
  26. 82
  27. 58
  28. 71
  29. 18
  30. 17
  31. 67
  32. 15
  33. 11
  34. 48
  35. 34
  36. 89
  37. 73
  38. 13
  39. 46
  40. 83

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