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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 868 · 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. 1.2 + ? = 10
  2. 2.8 + ? = 10
  3. 3.7 + ? = 10
  4. 4.1 + ? = 10
  5. 5.14 + ? = 100
  6. 6.32 + ? = 100
  7. 7.56 + ? = 100
  8. 8.13 + ? = 100
  9. 9.72 + ? = 100
  10. 10.22 + ? = 100
  11. 11.47 + ? = 100
  12. 12.6 + ? = 10
  13. 13.3 + ? = 10
  14. 14.5 + ? = 10
  15. 15.12 + ? = 100
  16. 16.9 + ? = 10
  17. 17.25 + ? = 100
  18. 18.86 + ? = 100
  19. 19.53 + ? = 100
  20. 20.74 + ? = 100
  21. 21.28 + ? = 100
  22. 22.85 + ? = 100
  23. 23.67 + ? = 100
  24. 24.21 + ? = 100
  25. 25.4 + ? = 10
  26. 26.66 + ? = 100
  27. 27.63 + ? = 100
  28. 28.65 + ? = 100
  29. 29.49 + ? = 100
  30. 30.58 + ? = 100
  31. 31.78 + ? = 100
  32. 32.40 + ? = 100
  33. 33.24 + ? = 100
  34. 34.31 + ? = 100
  35. 35.17 + ? = 100
  36. 36.75 + ? = 100
  37. 37.77 + ? = 100
  38. 38.37 + ? = 100
  39. 39.41 + ? = 100
  40. 40.89 + ? = 100

Answer key

  1. 8
  2. 2
  3. 3
  4. 9
  5. 86
  6. 68
  7. 44
  8. 87
  9. 28
  10. 78
  11. 53
  12. 4
  13. 7
  14. 5
  15. 88
  16. 1
  17. 75
  18. 14
  19. 47
  20. 26
  21. 72
  22. 15
  23. 33
  24. 79
  25. 6
  26. 34
  27. 37
  28. 35
  29. 51
  30. 42
  31. 22
  32. 60
  33. 76
  34. 69
  35. 83
  36. 25
  37. 23
  38. 63
  39. 59
  40. 11

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