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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 56 · 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. 1.18 + ? = 100
  2. 2.5 + ? = 10
  3. 3.4 + ? = 10
  4. 4.26 + ? = 100
  5. 5.30 + ? = 100
  6. 6.2 + ? = 10
  7. 7.3 + ? = 10
  8. 8.31 + ? = 100
  9. 9.87 + ? = 100
  10. 10.12 + ? = 100
  11. 11.9 + ? = 10
  12. 12.7 + ? = 10
  13. 13.49 + ? = 100
  14. 14.39 + ? = 100
  15. 15.54 + ? = 100
  16. 16.17 + ? = 100
  17. 17.60 + ? = 100
  18. 18.42 + ? = 100
  19. 19.6 + ? = 10
  20. 20.48 + ? = 100
  21. 21.15 + ? = 100
  22. 22.8 + ? = 10
  23. 23.72 + ? = 100
  24. 24.1 + ? = 10
  25. 25.79 + ? = 100
  26. 26.46 + ? = 100
  27. 27.45 + ? = 100
  28. 28.11 + ? = 100
  29. 29.84 + ? = 100
  30. 30.64 + ? = 100
  31. 31.40 + ? = 100
  32. 32.66 + ? = 100
  33. 33.25 + ? = 100
  34. 34.58 + ? = 100
  35. 35.65 + ? = 100
  36. 36.33 + ? = 100
  37. 37.34 + ? = 100
  38. 38.32 + ? = 100
  39. 39.22 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 82
  2. 5
  3. 6
  4. 74
  5. 70
  6. 8
  7. 7
  8. 69
  9. 13
  10. 88
  11. 1
  12. 3
  13. 51
  14. 61
  15. 46
  16. 83
  17. 40
  18. 58
  19. 4
  20. 52
  21. 85
  22. 2
  23. 28
  24. 9
  25. 21
  26. 54
  27. 55
  28. 89
  29. 16
  30. 36
  31. 60
  32. 34
  33. 75
  34. 42
  35. 35
  36. 67
  37. 66
  38. 68
  39. 78
  40. 41

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