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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 474 · 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. 1.76 + ? = 100
  2. 2.2 + ? = 10
  3. 3.34 + ? = 100
  4. 4.7 + ? = 10
  5. 5.3 + ? = 10
  6. 6.16 + ? = 100
  7. 7.1 + ? = 10
  8. 8.11 + ? = 100
  9. 9.48 + ? = 100
  10. 10.33 + ? = 100
  11. 11.28 + ? = 100
  12. 12.9 + ? = 10
  13. 13.55 + ? = 100
  14. 14.89 + ? = 100
  15. 15.6 + ? = 10
  16. 16.41 + ? = 100
  17. 17.5 + ? = 10
  18. 18.71 + ? = 100
  19. 19.35 + ? = 100
  20. 20.58 + ? = 100
  21. 21.14 + ? = 100
  22. 22.59 + ? = 100
  23. 23.81 + ? = 100
  24. 24.13 + ? = 100
  25. 25.57 + ? = 100
  26. 26.80 + ? = 100
  27. 27.21 + ? = 100
  28. 28.17 + ? = 100
  29. 29.8 + ? = 10
  30. 30.51 + ? = 100
  31. 31.4 + ? = 10
  32. 32.67 + ? = 100
  33. 33.65 + ? = 100
  34. 34.47 + ? = 100
  35. 35.32 + ? = 100
  36. 36.40 + ? = 100
  37. 37.66 + ? = 100
  38. 38.18 + ? = 100
  39. 39.79 + ? = 100
  40. 40.29 + ? = 100

Answer key

  1. 24
  2. 8
  3. 66
  4. 3
  5. 7
  6. 84
  7. 9
  8. 89
  9. 52
  10. 67
  11. 72
  12. 1
  13. 45
  14. 11
  15. 4
  16. 59
  17. 5
  18. 29
  19. 65
  20. 42
  21. 86
  22. 41
  23. 19
  24. 87
  25. 43
  26. 20
  27. 79
  28. 83
  29. 2
  30. 49
  31. 6
  32. 33
  33. 35
  34. 53
  35. 68
  36. 60
  37. 34
  38. 82
  39. 21
  40. 71

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