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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 326 · 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. 2.4 + ? = 10
  3. 3.26 + ? = 100
  4. 4.78 + ? = 100
  5. 5.37 + ? = 100
  6. 6.3 + ? = 10
  7. 7.8 + ? = 10
  8. 8.14 + ? = 100
  9. 9.83 + ? = 100
  10. 10.9 + ? = 10
  11. 11.2 + ? = 10
  12. 12.71 + ? = 100
  13. 13.5 + ? = 10
  14. 14.17 + ? = 100
  15. 15.28 + ? = 100
  16. 16.1 + ? = 10
  17. 17.6 + ? = 10
  18. 18.81 + ? = 100
  19. 19.73 + ? = 100
  20. 20.48 + ? = 100
  21. 21.7 + ? = 10
  22. 22.79 + ? = 100
  23. 23.18 + ? = 100
  24. 24.25 + ? = 100
  25. 25.22 + ? = 100
  26. 26.55 + ? = 100
  27. 27.47 + ? = 100
  28. 28.40 + ? = 100
  29. 29.86 + ? = 100
  30. 30.70 + ? = 100
  31. 31.85 + ? = 100
  32. 32.76 + ? = 100
  33. 33.58 + ? = 100
  34. 34.82 + ? = 100
  35. 35.42 + ? = 100
  36. 36.50 + ? = 100
  37. 37.23 + ? = 100
  38. 38.11 + ? = 100
  39. 39.51 + ? = 100
  40. 40.68 + ? = 100

Answer key

  1. 35
  2. 6
  3. 74
  4. 22
  5. 63
  6. 7
  7. 2
  8. 86
  9. 17
  10. 1
  11. 8
  12. 29
  13. 5
  14. 83
  15. 72
  16. 9
  17. 4
  18. 19
  19. 27
  20. 52
  21. 3
  22. 21
  23. 82
  24. 75
  25. 78
  26. 45
  27. 53
  28. 60
  29. 14
  30. 30
  31. 15
  32. 24
  33. 42
  34. 18
  35. 58
  36. 50
  37. 77
  38. 89
  39. 49
  40. 32

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