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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 694 · 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. 1.75 + ? = 100
  2. 2.3 + ? = 10
  3. 3.74 + ? = 100
  4. 4.26 + ? = 100
  5. 5.8 + ? = 10
  6. 6.65 + ? = 100
  7. 7.9 + ? = 10
  8. 8.55 + ? = 100
  9. 9.61 + ? = 100
  10. 10.78 + ? = 100
  11. 11.5 + ? = 10
  12. 12.79 + ? = 100
  13. 13.73 + ? = 100
  14. 14.2 + ? = 10
  15. 15.7 + ? = 10
  16. 16.68 + ? = 100
  17. 17.1 + ? = 10
  18. 18.62 + ? = 100
  19. 19.11 + ? = 100
  20. 20.6 + ? = 10
  21. 21.4 + ? = 10
  22. 22.82 + ? = 100
  23. 23.72 + ? = 100
  24. 24.43 + ? = 100
  25. 25.40 + ? = 100
  26. 26.15 + ? = 100
  27. 27.63 + ? = 100
  28. 28.18 + ? = 100
  29. 29.25 + ? = 100
  30. 30.20 + ? = 100
  31. 31.13 + ? = 100
  32. 32.76 + ? = 100
  33. 33.56 + ? = 100
  34. 34.16 + ? = 100
  35. 35.32 + ? = 100
  36. 36.64 + ? = 100
  37. 37.70 + ? = 100
  38. 38.83 + ? = 100
  39. 39.89 + ? = 100
  40. 40.34 + ? = 100

Answer key

  1. 25
  2. 7
  3. 26
  4. 74
  5. 2
  6. 35
  7. 1
  8. 45
  9. 39
  10. 22
  11. 5
  12. 21
  13. 27
  14. 8
  15. 3
  16. 32
  17. 9
  18. 38
  19. 89
  20. 4
  21. 6
  22. 18
  23. 28
  24. 57
  25. 60
  26. 85
  27. 37
  28. 82
  29. 75
  30. 80
  31. 87
  32. 24
  33. 44
  34. 84
  35. 68
  36. 36
  37. 30
  38. 17
  39. 11
  40. 66

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