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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 75 · 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. 1.7 + ? = 10
  2. 2.9 + ? = 10
  3. 3.40 + ? = 100
  4. 4.14 + ? = 100
  5. 5.2 + ? = 10
  6. 6.63 + ? = 100
  7. 7.3 + ? = 10
  8. 8.47 + ? = 100
  9. 9.65 + ? = 100
  10. 10.4 + ? = 10
  11. 11.35 + ? = 100
  12. 12.1 + ? = 10
  13. 13.88 + ? = 100
  14. 14.26 + ? = 100
  15. 15.66 + ? = 100
  16. 16.8 + ? = 10
  17. 17.25 + ? = 100
  18. 18.85 + ? = 100
  19. 19.20 + ? = 100
  20. 20.13 + ? = 100
  21. 21.16 + ? = 100
  22. 22.19 + ? = 100
  23. 23.32 + ? = 100
  24. 24.58 + ? = 100
  25. 25.52 + ? = 100
  26. 26.5 + ? = 10
  27. 27.18 + ? = 100
  28. 28.30 + ? = 100
  29. 29.77 + ? = 100
  30. 30.46 + ? = 100
  31. 31.11 + ? = 100
  32. 32.12 + ? = 100
  33. 33.28 + ? = 100
  34. 34.49 + ? = 100
  35. 35.6 + ? = 10
  36. 36.9 + ? = 10
  37. 37.69 + ? = 100
  38. 38.17 + ? = 100
  39. 39.72 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 3
  2. 1
  3. 60
  4. 86
  5. 8
  6. 37
  7. 7
  8. 53
  9. 35
  10. 6
  11. 65
  12. 9
  13. 12
  14. 74
  15. 34
  16. 2
  17. 75
  18. 15
  19. 80
  20. 87
  21. 84
  22. 81
  23. 68
  24. 42
  25. 48
  26. 5
  27. 82
  28. 70
  29. 23
  30. 54
  31. 89
  32. 88
  33. 72
  34. 51
  35. 4
  36. 1
  37. 31
  38. 83
  39. 28
  40. 29

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