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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 526 · 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. 1.4 + ? = 10
  2. 2.70 + ? = 100
  3. 3.2 + ? = 10
  4. 4.6 + ? = 10
  5. 5.14 + ? = 100
  6. 6.9 + ? = 10
  7. 7.3 + ? = 10
  8. 8.7 + ? = 10
  9. 9.83 + ? = 100
  10. 10.47 + ? = 100
  11. 11.16 + ? = 100
  12. 12.38 + ? = 100
  13. 13.8 + ? = 10
  14. 14.51 + ? = 100
  15. 15.88 + ? = 100
  16. 16.5 + ? = 10
  17. 17.26 + ? = 100
  18. 18.56 + ? = 100
  19. 19.37 + ? = 100
  20. 20.55 + ? = 100
  21. 21.1 + ? = 10
  22. 22.17 + ? = 100
  23. 23.46 + ? = 100
  24. 24.18 + ? = 100
  25. 25.76 + ? = 100
  26. 26.89 + ? = 100
  27. 27.71 + ? = 100
  28. 28.73 + ? = 100
  29. 29.13 + ? = 100
  30. 30.86 + ? = 100
  31. 31.28 + ? = 100
  32. 32.22 + ? = 100
  33. 33.21 + ? = 100
  34. 34.41 + ? = 100
  35. 35.85 + ? = 100
  36. 36.58 + ? = 100
  37. 37.69 + ? = 100
  38. 38.15 + ? = 100
  39. 39.68 + ? = 100
  40. 40.79 + ? = 100

Answer key

  1. 6
  2. 30
  3. 8
  4. 4
  5. 86
  6. 1
  7. 7
  8. 3
  9. 17
  10. 53
  11. 84
  12. 62
  13. 2
  14. 49
  15. 12
  16. 5
  17. 74
  18. 44
  19. 63
  20. 45
  21. 9
  22. 83
  23. 54
  24. 82
  25. 24
  26. 11
  27. 29
  28. 27
  29. 87
  30. 14
  31. 72
  32. 78
  33. 79
  34. 59
  35. 15
  36. 42
  37. 31
  38. 85
  39. 32
  40. 21

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