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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 331 · 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. 1.78 + ? = 100
  2. 2.71 + ? = 100
  3. 3.4 + ? = 10
  4. 4.84 + ? = 100
  5. 5.7 + ? = 10
  6. 6.8 + ? = 10
  7. 7.70 + ? = 100
  8. 8.27 + ? = 100
  9. 9.68 + ? = 100
  10. 10.42 + ? = 100
  11. 11.6 + ? = 10
  12. 12.55 + ? = 100
  13. 13.1 + ? = 10
  14. 14.3 + ? = 10
  15. 15.32 + ? = 100
  16. 16.72 + ? = 100
  17. 17.74 + ? = 100
  18. 18.81 + ? = 100
  19. 19.46 + ? = 100
  20. 20.16 + ? = 100
  21. 21.2 + ? = 10
  22. 22.57 + ? = 100
  23. 23.52 + ? = 100
  24. 24.35 + ? = 100
  25. 25.62 + ? = 100
  26. 26.41 + ? = 100
  27. 27.66 + ? = 100
  28. 28.30 + ? = 100
  29. 29.39 + ? = 100
  30. 30.19 + ? = 100
  31. 31.76 + ? = 100
  32. 32.18 + ? = 100
  33. 33.5 + ? = 10
  34. 34.53 + ? = 100
  35. 35.61 + ? = 100
  36. 36.82 + ? = 100
  37. 37.12 + ? = 100
  38. 38.28 + ? = 100
  39. 39.25 + ? = 100
  40. 40.9 + ? = 10

Answer key

  1. 22
  2. 29
  3. 6
  4. 16
  5. 3
  6. 2
  7. 30
  8. 73
  9. 32
  10. 58
  11. 4
  12. 45
  13. 9
  14. 7
  15. 68
  16. 28
  17. 26
  18. 19
  19. 54
  20. 84
  21. 8
  22. 43
  23. 48
  24. 65
  25. 38
  26. 59
  27. 34
  28. 70
  29. 61
  30. 81
  31. 24
  32. 82
  33. 5
  34. 47
  35. 39
  36. 18
  37. 88
  38. 72
  39. 75
  40. 1

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