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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 515 · 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. 1.25 + ? = 100
  2. 2.77 + ? = 100
  3. 3.3 + ? = 10
  4. 4.8 + ? = 10
  5. 5.9 + ? = 10
  6. 6.32 + ? = 100
  7. 7.41 + ? = 100
  8. 8.7 + ? = 10
  9. 9.30 + ? = 100
  10. 10.14 + ? = 100
  11. 11.57 + ? = 100
  12. 12.4 + ? = 10
  13. 13.11 + ? = 100
  14. 14.15 + ? = 100
  15. 15.2 + ? = 10
  16. 16.86 + ? = 100
  17. 17.74 + ? = 100
  18. 18.1 + ? = 10
  19. 19.42 + ? = 100
  20. 20.6 + ? = 10
  21. 21.70 + ? = 100
  22. 22.20 + ? = 100
  23. 23.89 + ? = 100
  24. 24.12 + ? = 100
  25. 25.38 + ? = 100
  26. 26.5 + ? = 10
  27. 27.78 + ? = 100
  28. 28.72 + ? = 100
  29. 29.33 + ? = 100
  30. 30.16 + ? = 100
  31. 31.53 + ? = 100
  32. 32.37 + ? = 100
  33. 33.26 + ? = 100
  34. 34.83 + ? = 100
  35. 35.17 + ? = 100
  36. 36.65 + ? = 100
  37. 37.56 + ? = 100
  38. 38.47 + ? = 100
  39. 39.79 + ? = 100
  40. 40.46 + ? = 100

Answer key

  1. 75
  2. 23
  3. 7
  4. 2
  5. 1
  6. 68
  7. 59
  8. 3
  9. 70
  10. 86
  11. 43
  12. 6
  13. 89
  14. 85
  15. 8
  16. 14
  17. 26
  18. 9
  19. 58
  20. 4
  21. 30
  22. 80
  23. 11
  24. 88
  25. 62
  26. 5
  27. 22
  28. 28
  29. 67
  30. 84
  31. 47
  32. 63
  33. 74
  34. 17
  35. 83
  36. 35
  37. 44
  38. 53
  39. 21
  40. 54

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